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    <link:label id="lab_trs_MetricTypeAxis_373BB3756C699BF66DF253D4F2BC837C_label_en-US" xlink:label="lab_trs_MetricTypeAxis_373BB3756C699BF66DF253D4F2BC837C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Metric Type [Axis]</link:label>
    <link:label id="lab_trs_MetricTypeAxis_373BB3756C699BF66DF253D4F2BC837C_documentation_en-US" xlink:label="lab_trs_MetricTypeAxis_373BB3756C699BF66DF253D4F2BC837C" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Types of financial metrics.</link:label>
    <link:loc xlink:href="trs-20170930.xsd#trs_MetricTypeAxis" xlink:label="loc_trs_MetricTypeAxis_373BB3756C699BF66DF253D4F2BC837C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_trs_MetricTypeAxis_373BB3756C699BF66DF253D4F2BC837C" xlink:to="lab_trs_MetricTypeAxis_373BB3756C699BF66DF253D4F2BC837C" xlink:type="arc" />
    <link:label id="lab_trs_MetricTypeDomain_25E3CBA55F8338B8018653D4F2BC0ABA_terseLabel_en-US" xlink:label="lab_trs_MetricTypeDomain_25E3CBA55F8338B8018653D4F2BC0ABA" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Metric Type [Domain]</link:label>
    <link:label id="lab_trs_MetricTypeDomain_25E3CBA55F8338B8018653D4F2BC0ABA_label_en-US" xlink:label="lab_trs_MetricTypeDomain_25E3CBA55F8338B8018653D4F2BC0ABA" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Metric Type [Domain]</link:label>
    <link:label id="lab_trs_MetricTypeDomain_25E3CBA55F8338B8018653D4F2BC0ABA_documentation_en-US" xlink:label="lab_trs_MetricTypeDomain_25E3CBA55F8338B8018653D4F2BC0ABA" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Type of financial metric.</link:label>
    <link:loc xlink:href="trs-20170930.xsd#trs_MetricTypeDomain" xlink:label="loc_trs_MetricTypeDomain_25E3CBA55F8338B8018653D4F2BC0ABA" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_trs_MetricTypeDomain_25E3CBA55F8338B8018653D4F2BC0ABA" xlink:to="lab_trs_MetricTypeDomain_25E3CBA55F8338B8018653D4F2BC0ABA" xlink:type="arc" />
    <link:label id="lab_trs_A3YearEpsCagrMetricMember_2AED1AB5464EA2664ED053D4F2BC5A28_terseLabel_en-US" xlink:label="lab_trs_A3YearEpsCagrMetricMember_2AED1AB5464EA2664ED053D4F2BC5A28" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">3 year EPS CAGR metric [Member]</link:label>
    <link:label id="lab_trs_A3YearEpsCagrMetricMember_2AED1AB5464EA2664ED053D4F2BC5A28_label_en-US" xlink:label="lab_trs_A3YearEpsCagrMetricMember_2AED1AB5464EA2664ED053D4F2BC5A28" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">3 year EPS CAGR metric [Member]</link:label>
    <link:label id="lab_trs_A3YearEpsCagrMetricMember_2AED1AB5464EA2664ED053D4F2BC5A28_documentation_en-US" xlink:label="lab_trs_A3YearEpsCagrMetricMember_2AED1AB5464EA2664ED053D4F2BC5A28" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Financial metric based on earnings per share (EPS) cumulative average growth rate ("EPS CAGR") over the performance period.</link:label>
    <link:loc xlink:href="trs-20170930.xsd#trs_A3YearEpsCagrMetricMember" xlink:label="loc_trs_A3YearEpsCagrMetricMember_2AED1AB5464EA2664ED053D4F2BC5A28" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_trs_A3YearEpsCagrMetricMember_2AED1AB5464EA2664ED053D4F2BC5A28" xlink:to="lab_trs_A3YearEpsCagrMetricMember_2AED1AB5464EA2664ED053D4F2BC5A28" xlink:type="arc" />
    <link:label id="lab_trs_TotalshareholderreturnmetricMember_A2266A41676735CCD1E953D4F2BC24DD_terseLabel_en-US" xlink:label="lab_trs_TotalshareholderreturnmetricMember_A2266A41676735CCD1E953D4F2BC24DD" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Total shareholder return metric [Member]</link:label>
    <link:label id="lab_trs_TotalshareholderreturnmetricMember_A2266A41676735CCD1E953D4F2BC24DD_label_en-US" xlink:label="lab_trs_TotalshareholderreturnmetricMember_A2266A41676735CCD1E953D4F2BC24DD" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Total shareholder return metric [Member]</link:label>
    <link:label id="lab_trs_TotalshareholderreturnmetricMember_A2266A41676735CCD1E953D4F2BC24DD_documentation_en-US" xlink:label="lab_trs_TotalshareholderreturnmetricMember_A2266A41676735CCD1E953D4F2BC24DD" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">The Company's total shareholder return (TSR) relative to the TSR of the common stock of a pre-defined industry peer-group measured over a specified period of time [Member]</link:label>
    <link:loc xlink:href="trs-20170930.xsd#trs_TotalshareholderreturnmetricMember" xlink:label="loc_trs_TotalshareholderreturnmetricMember_A2266A41676735CCD1E953D4F2BC24DD" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_trs_TotalshareholderreturnmetricMember_A2266A41676735CCD1E953D4F2BC24DD" xlink:to="lab_trs_TotalshareholderreturnmetricMember_A2266A41676735CCD1E953D4F2BC24DD" xlink:type="arc" />
    <link:label id="lab_trs_EPSCAGRandcashgenerationmetricMemberMember_8BC90DA6961060C9CD1653D4F2BCE529_terseLabel_en-US" xlink:label="lab_trs_EPSCAGRandcashgenerationmetricMemberMember_8BC90DA6961060C9CD1653D4F2BCE529" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">EPS CAGR and cash generation metric [Member]</link:label>
    <link:label id="lab_trs_EPSCAGRandcashgenerationmetricMemberMember_8BC90DA6961060C9CD1653D4F2BCE529_label_en-US" xlink:label="lab_trs_EPSCAGRandcashgenerationmetricMemberMember_8BC90DA6961060C9CD1653D4F2BCE529" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">EPS CAGR and cash generation metric [Member] [Member]</link:label>
    <link:label id="lab_trs_EPSCAGRandcashgenerationmetricMemberMember_8BC90DA6961060C9CD1653D4F2BCE529_documentation_en-US" xlink:label="lab_trs_EPSCAGRandcashgenerationmetricMemberMember_8BC90DA6961060C9CD1653D4F2BCE529" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">EPS CAGR and cash generation metric [Member]</link:label>
    <link:loc xlink:href="trs-20170930.xsd#trs_EPSCAGRandcashgenerationmetricMemberMember" xlink:label="loc_trs_EPSCAGRandcashgenerationmetricMemberMember_8BC90DA6961060C9CD1653D4F2BCE529" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_trs_EPSCAGRandcashgenerationmetricMemberMember_8BC90DA6961060C9CD1653D4F2BCE529" xlink:to="lab_trs_EPSCAGRandcashgenerationmetricMemberMember_8BC90DA6961060C9CD1653D4F2BCE529" xlink:type="arc" />
    <link:label id="lab_us-gaap_PlanNameAxis_69119CFA509ECB88F87953D4F2BC626F_terseLabel_en-US" xlink:label="lab_us-gaap_PlanNameAxis_69119CFA509ECB88F87953D4F2BC626F" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Plan Name [Axis]</link:label>
    <link:label id="lab_us-gaap_PlanNameAxis_69119CFA509ECB88F87953D4F2BC626F_label_en-US" xlink:label="lab_us-gaap_PlanNameAxis_69119CFA509ECB88F87953D4F2BC626F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Plan Name [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PlanNameAxis" xlink:label="loc_us-gaap_PlanNameAxis_69119CFA509ECB88F87953D4F2BC626F" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PlanNameAxis_69119CFA509ECB88F87953D4F2BC626F" xlink:to="lab_us-gaap_PlanNameAxis_69119CFA509ECB88F87953D4F2BC626F" xlink:type="arc" />
    <link:label id="lab_us-gaap_PlanNameDomain_0082D2E0B2D71D7604ED53D4F2BC8964_terseLabel_en-US" xlink:label="lab_us-gaap_PlanNameDomain_0082D2E0B2D71D7604ED53D4F2BC8964" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Plan Name [Domain]</link:label>
    <link:label id="lab_us-gaap_PlanNameDomain_0082D2E0B2D71D7604ED53D4F2BC8964_label_en-US" xlink:label="lab_us-gaap_PlanNameDomain_0082D2E0B2D71D7604ED53D4F2BC8964" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Plan Name [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PlanNameDomain" xlink:label="loc_us-gaap_PlanNameDomain_0082D2E0B2D71D7604ED53D4F2BC8964" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PlanNameDomain_0082D2E0B2D71D7604ED53D4F2BC8964" xlink:to="lab_us-gaap_PlanNameDomain_0082D2E0B2D71D7604ED53D4F2BC8964" xlink:type="arc" />
    <link:label id="lab_trs_Plan1Member_13628AEB3A53AC97ED5F53D4F2BC4D8B_terseLabel_en-US" xlink:label="lab_trs_Plan1Member_13628AEB3A53AC97ED5F53D4F2BC4D8B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Plan 1 [Member]</link:label>
    <link:label id="lab_trs_Plan1Member_13628AEB3A53AC97ED5F53D4F2BC4D8B_label_en-US" xlink:label="lab_trs_Plan1Member_13628AEB3A53AC97ED5F53D4F2BC4D8B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Plan 1 [Member]</link:label>
    <link:label id="lab_trs_Plan1Member_13628AEB3A53AC97ED5F53D4F2BC4D8B_documentation_en-US" xlink:label="lab_trs_Plan1Member_13628AEB3A53AC97ED5F53D4F2BC4D8B" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Equity-based compensation arrangement plan.</link:label>
    <link:loc xlink:href="trs-20170930.xsd#trs_Plan1Member" xlink:label="loc_trs_Plan1Member_13628AEB3A53AC97ED5F53D4F2BC4D8B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_trs_Plan1Member_13628AEB3A53AC97ED5F53D4F2BC4D8B" xlink:to="lab_trs_Plan1Member_13628AEB3A53AC97ED5F53D4F2BC4D8B" xlink:type="arc" />
    <link:label id="lab_trs_Plan2Member_C0AD3F57304F1A91052653D4F2BC9376_terseLabel_en-US" xlink:label="lab_trs_Plan2Member_C0AD3F57304F1A91052653D4F2BC9376" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Plan 2 [Member]</link:label>
    <link:label id="lab_trs_Plan2Member_C0AD3F57304F1A91052653D4F2BC9376_label_en-US" xlink:label="lab_trs_Plan2Member_C0AD3F57304F1A91052653D4F2BC9376" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Plan 2 [Member]</link:label>
    <link:label id="lab_trs_Plan2Member_C0AD3F57304F1A91052653D4F2BC9376_documentation_en-US" xlink:label="lab_trs_Plan2Member_C0AD3F57304F1A91052653D4F2BC9376" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Equity-based compensation arrangement plan.</link:label>
    <link:loc xlink:href="trs-20170930.xsd#trs_Plan2Member" xlink:label="loc_trs_Plan2Member_C0AD3F57304F1A91052653D4F2BC9376" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_trs_Plan2Member_C0AD3F57304F1A91052653D4F2BC9376" xlink:to="lab_trs_Plan2Member_C0AD3F57304F1A91052653D4F2BC9376" xlink:type="arc" />
    <link:label id="lab_trs_Plan3Member_27B725C63B89B2E9045653D4F2BC51F6_terseLabel_en-US" xlink:label="lab_trs_Plan3Member_27B725C63B89B2E9045653D4F2BC51F6" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Plan 3 [Member]</link:label>
    <link:label id="lab_trs_Plan3Member_27B725C63B89B2E9045653D4F2BC51F6_label_en-US" xlink:label="lab_trs_Plan3Member_27B725C63B89B2E9045653D4F2BC51F6" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Plan 3 [Member]</link:label>
    <link:label id="lab_trs_Plan3Member_27B725C63B89B2E9045653D4F2BC51F6_documentation_en-US" xlink:label="lab_trs_Plan3Member_27B725C63B89B2E9045653D4F2BC51F6" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Equity-based compensation arrangement plan.</link:label>
    <link:loc xlink:href="trs-20170930.xsd#trs_Plan3Member" xlink:label="loc_trs_Plan3Member_27B725C63B89B2E9045653D4F2BC51F6" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_trs_Plan3Member_27B725C63B89B2E9045653D4F2BC51F6" xlink:to="lab_trs_Plan3Member_27B725C63B89B2E9045653D4F2BC51F6" xlink:type="arc" />
    <link:label id="lab_trs_Plan4Member_189066620B49909B205753D4F2BCADC9_terseLabel_en-US" xlink:label="lab_trs_Plan4Member_189066620B49909B205753D4F2BCADC9" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Plan 4 [Member]</link:label>
    <link:label id="lab_trs_Plan4Member_189066620B49909B205753D4F2BCADC9_label_en-US" xlink:label="lab_trs_Plan4Member_189066620B49909B205753D4F2BCADC9" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Plan 4 [Member]</link:label>
    <link:label id="lab_trs_Plan4Member_189066620B49909B205753D4F2BCADC9_documentation_en-US" xlink:label="lab_trs_Plan4Member_189066620B49909B205753D4F2BCADC9" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Equity-based compensation arrangement plan.</link:label>
    <link:loc xlink:href="trs-20170930.xsd#trs_Plan4Member" xlink:label="loc_trs_Plan4Member_189066620B49909B205753D4F2BCADC9" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_trs_Plan4Member_189066620B49909B205753D4F2BCADC9" xlink:to="lab_trs_Plan4Member_189066620B49909B205753D4F2BCADC9" xlink:type="arc" />
    <link:label id="lab_trs_Plan5Member_E6BAF4C0BC12C12D75CE53D4F2BC445B_terseLabel_en-US" xlink:label="lab_trs_Plan5Member_E6BAF4C0BC12C12D75CE53D4F2BC445B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Plan 5 [Member]</link:label>
    <link:label id="lab_trs_Plan5Member_E6BAF4C0BC12C12D75CE53D4F2BC445B_label_en-US" xlink:label="lab_trs_Plan5Member_E6BAF4C0BC12C12D75CE53D4F2BC445B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Plan 5 [Member]</link:label>
    <link:label id="lab_trs_Plan5Member_E6BAF4C0BC12C12D75CE53D4F2BC445B_documentation_en-US" xlink:label="lab_trs_Plan5Member_E6BAF4C0BC12C12D75CE53D4F2BC445B" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Equity-based compensation arrangement plan.</link:label>
    <link:loc xlink:href="trs-20170930.xsd#trs_Plan5Member" xlink:label="loc_trs_Plan5Member_E6BAF4C0BC12C12D75CE53D4F2BC445B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_trs_Plan5Member_E6BAF4C0BC12C12D75CE53D4F2BC445B" xlink:to="lab_trs_Plan5Member_E6BAF4C0BC12C12D75CE53D4F2BC445B" xlink:type="arc" />
    <link:label id="lab_trs_Plan7Member_B749D54130F47BC6F50253D4F2BC815C_terseLabel_en-US" xlink:label="lab_trs_Plan7Member_B749D54130F47BC6F50253D4F2BC815C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Plan 7 [Member]</link:label>
    <link:label id="lab_trs_Plan7Member_B749D54130F47BC6F50253D4F2BC815C_label_en-US" xlink:label="lab_trs_Plan7Member_B749D54130F47BC6F50253D4F2BC815C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Plan 7 [Member]</link:label>
    <link:label id="lab_trs_Plan7Member_B749D54130F47BC6F50253D4F2BC815C_documentation_en-US" xlink:label="lab_trs_Plan7Member_B749D54130F47BC6F50253D4F2BC815C" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Plan 7 [Member]</link:label>
    <link:loc xlink:href="trs-20170930.xsd#trs_Plan7Member" xlink:label="loc_trs_Plan7Member_B749D54130F47BC6F50253D4F2BC815C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_trs_Plan7Member_B749D54130F47BC6F50253D4F2BC815C" xlink:to="lab_trs_Plan7Member_B749D54130F47BC6F50253D4F2BC815C" xlink:type="arc" />
    <link:label id="lab_trs_Plan8Member_3CC99062BFB12C76432853D4F2BCA4DB_terseLabel_en-US" xlink:label="lab_trs_Plan8Member_3CC99062BFB12C76432853D4F2BCA4DB" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Plan 8 [Member]</link:label>
    <link:label id="lab_trs_Plan8Member_3CC99062BFB12C76432853D4F2BCA4DB_label_en-US" xlink:label="lab_trs_Plan8Member_3CC99062BFB12C76432853D4F2BCA4DB" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Plan 8 [Member]</link:label>
    <link:label id="lab_trs_Plan8Member_3CC99062BFB12C76432853D4F2BCA4DB_documentation_en-US" xlink:label="lab_trs_Plan8Member_3CC99062BFB12C76432853D4F2BCA4DB" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Plan 8 [Member]</link:label>
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    <link:label id="lab_us-gaap_RestrictedStockMember_C1B776DCBA7D1729606C53D4F2BC32EF_verboseLabel_en-US" xlink:label="lab_us-gaap_RestrictedStockMember_C1B776DCBA7D1729606C53D4F2BC32EF" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Restricted Shares [Member]</link:label>
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    <link:label id="lab_trs_ServiceBasedRestricedSharesMember_B8E4311EA6B827C995AC53D4F2BC2A26_terseLabel_en-US" xlink:label="lab_trs_ServiceBasedRestricedSharesMember_B8E4311EA6B827C995AC53D4F2BC2A26" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Service-based restriced shares [Member]</link:label>
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    <link:label id="lab_trs_ServiceBasedRestricedSharesMember_B8E4311EA6B827C995AC53D4F2BC2A26_documentation_en-US" xlink:label="lab_trs_ServiceBasedRestricedSharesMember_B8E4311EA6B827C995AC53D4F2BC2A26" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Shares that an entity has not yet issued because the agreed-upon consideration, emplooyee services, has not yet been received</link:label>
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    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_trs_ServiceBasedRestricedSharesMember_B8E4311EA6B827C995AC53D4F2BC2A26" xlink:to="lab_trs_ServiceBasedRestricedSharesMember_B8E4311EA6B827C995AC53D4F2BC2A26" xlink:type="arc" />
    <link:label id="lab_trs_PerformanceBasedRestricedSharesMember_1451337B996666453D5B53D4F2BC6EDB_terseLabel_en-US" xlink:label="lab_trs_PerformanceBasedRestricedSharesMember_1451337B996666453D5B53D4F2BC6EDB" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Performance-based restriced shares [Member]</link:label>
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    <link:label id="lab_us-gaap_TitleOfIndividualAxis_0193894B08DB223E0E5F53D4F2BC5546_label_en-US" xlink:label="lab_us-gaap_TitleOfIndividualAxis_0193894B08DB223E0E5F53D4F2BC5546" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Title of Individual [Axis]</link:label>
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    <link:label id="lab_us-gaap_DirectorMember_5DA935D29C7E67D759FC53D4F2BC57CE_terseLabel_en-US" xlink:label="lab_us-gaap_DirectorMember_5DA935D29C7E67D759FC53D4F2BC57CE" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Non-employee independent director [Member]</link:label>
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_91CE9DB0EBDB364920FA53D4F2BC7374" xlink:type="locator" />
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardRequisiteServicePeriod1" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardRequisiteServicePeriod1_2E76E52F9C1FCC505D8553D4F2BC66C5" xlink:type="locator" />
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    <link:label id="lab_trs_ShareBasedCompensationArrangementByShareBasedPaymentAwardIncentiveCompensationPlanThresholdTargetAwardForGrantingStockAward_F96ACA11FC1DA48C7FC553D4F2BCCCF8_terseLabel_en-US" xlink:label="lab_trs_ShareBasedCompensationArrangementByShareBasedPaymentAwardIncentiveCompensationPlanThresholdTargetAwardForGrantingStockAward_F96ACA11FC1DA48C7FC553D4F2BCCCF8" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">ICP, Threshold target for granting stock awards</link:label>
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    <link:label id="lab_us-gaap_SecuredDebtMember_78F7ABE8642BAB891D22F2064A385F72_label_en-US" xlink:label="lab_us-gaap_SecuredDebtMember_78F7ABE8642BAB891D22F2064A385F72" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Secured Debt [Member]</link:label>
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    <link:label id="lab_us-gaap_SecuredDebt_3039760F89584A57187EF2064A385D26_label_en-US" xlink:label="lab_us-gaap_SecuredDebt_3039760F89584A57187EF2064A385D26" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Secured Debt</link:label>
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    <link:label id="lab_trs_ReceivablesFacililtyDebtAggregateCosts_696724F89583D4A8DC71F2064A38B76C_documentation_en-US" xlink:label="lab_trs_ReceivablesFacililtyDebtAggregateCosts_696724F89583D4A8DC71F2064A38B76C" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Amount of the fee that accompanies borrowing money under the debt instrument.</link:label>
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    <link:label id="lab_us-gaap_DebtInstrumentMaturityDate_27CA11CF8217AD549AF4F2064A383928_label_en-US" xlink:label="lab_us-gaap_DebtInstrumentMaturityDate_27CA11CF8217AD549AF4F2064A383928" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Instrument, Maturity Date</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DebtInstrumentMaturityDate" xlink:label="loc_us-gaap_DebtInstrumentMaturityDate_27CA11CF8217AD549AF4F2064A383928" xlink:type="locator" />
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    <link:label id="lab_trs_AverageliquidationperiodReceivablespool_9963DBDFCECD62E71692F2064A388FB2_documentation_en-US" xlink:label="lab_trs_AverageliquidationperiodReceivablespool_9963DBDFCECD62E71692F2064A388FB2" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Average liquidation period, Receivables pool</link:label>
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    <link:label id="lab_us-gaap_CashAndCashEquivalentsAtCarryingValue_5764D449194D3438479B4B1EF0FC851B_periodEndLabel_en-US" xlink:label="lab_us-gaap_CashAndCashEquivalentsAtCarryingValue_5764D449194D3438479B4B1EF0FC851B" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:type="resource" xml:lang="en-US">At end of period</link:label>
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    <link:label id="lab_us-gaap_InterestPaidNet_BA6041C3F6AA4C161D914B1EF0FC1955_terseLabel_en-US" xlink:label="lab_us-gaap_InterestPaidNet_BA6041C3F6AA4C161D914B1EF0FC1955" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Cash paid for interest</link:label>
    <link:label id="lab_us-gaap_InterestPaidNet_BA6041C3F6AA4C161D914B1EF0FC1955_label_en-US" xlink:label="lab_us-gaap_InterestPaidNet_BA6041C3F6AA4C161D914B1EF0FC1955" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Interest Paid, Net</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_InterestPaidNet" xlink:label="loc_us-gaap_InterestPaidNet_BA6041C3F6AA4C161D914B1EF0FC1955" xlink:type="locator" />
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    <link:label id="lab_us-gaap_IncomeTaxesPaid_B2BE59E78D899E9022394B1EF0FC68E3_terseLabel_en-US" xlink:label="lab_us-gaap_IncomeTaxesPaid_B2BE59E78D899E9022394B1EF0FC68E3" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Cash paid for taxes</link:label>
    <link:label id="lab_us-gaap_IncomeTaxesPaid_B2BE59E78D899E9022394B1EF0FC68E3_label_en-US" xlink:label="lab_us-gaap_IncomeTaxesPaid_B2BE59E78D899E9022394B1EF0FC68E3" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Income Taxes Paid</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeTaxesPaid" xlink:label="loc_us-gaap_IncomeTaxesPaid_B2BE59E78D899E9022394B1EF0FC68E3" xlink:type="locator" />
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    <link:label id="lab_us-gaap_ScheduleOfDebtTableTextBlock_958394A1C8DACCF089ACF24903EE4965_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfDebtTableTextBlock_958394A1C8DACCF089ACF24903EE4965" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Debt</link:label>
    <link:label id="lab_us-gaap_ScheduleOfDebtTableTextBlock_958394A1C8DACCF089ACF24903EE4965_label_en-US" xlink:label="lab_us-gaap_ScheduleOfDebtTableTextBlock_958394A1C8DACCF089ACF24903EE4965" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Schedule of Debt [Table Text Block]</link:label>
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    <link:label id="lab_us-gaap_CreditFacilityAxis_8A6A832E42DF3D3A414E53BCD5974EB8_terseLabel_en-US" xlink:label="lab_us-gaap_CreditFacilityAxis_8A6A832E42DF3D3A414E53BCD5974EB8" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Credit Facility [Axis]</link:label>
    <link:label id="lab_us-gaap_CreditFacilityAxis_8A6A832E42DF3D3A414E53BCD5974EB8_label_en-US" xlink:label="lab_us-gaap_CreditFacilityAxis_8A6A832E42DF3D3A414E53BCD5974EB8" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Credit Facility [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CreditFacilityAxis" xlink:label="loc_us-gaap_CreditFacilityAxis_8A6A832E42DF3D3A414E53BCD5974EB8" xlink:type="locator" />
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    <link:label id="lab_us-gaap_CreditFacilityDomain_C29E73E456E034E6C8C853BCD5F4CF27_terseLabel_en-US" xlink:label="lab_us-gaap_CreditFacilityDomain_C29E73E456E034E6C8C853BCD5F4CF27" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Credit Facility [Domain]</link:label>
    <link:label id="lab_us-gaap_CreditFacilityDomain_C29E73E456E034E6C8C853BCD5F4CF27_label_en-US" xlink:label="lab_us-gaap_CreditFacilityDomain_C29E73E456E034E6C8C853BCD5F4CF27" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Credit Facility [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CreditFacilityDomain" xlink:label="loc_us-gaap_CreditFacilityDomain_C29E73E456E034E6C8C853BCD5F4CF27" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CreditFacilityDomain_C29E73E456E034E6C8C853BCD5F4CF27" xlink:to="lab_us-gaap_CreditFacilityDomain_C29E73E456E034E6C8C853BCD5F4CF27" xlink:type="arc" />
    <link:label id="lab_trs_A4.875SeniorUnsecuredNotesDue2025Member_75B7C841C273A0A30C1553BBDEF82FB0_terseLabel_en-US" xlink:label="lab_trs_A4.875SeniorUnsecuredNotesDue2025Member_75B7C841C273A0A30C1553BBDEF82FB0" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">4.875% Senior Unsecured Notes Due 2025 [Member]</link:label>
    <link:label id="lab_trs_A4.875SeniorUnsecuredNotesDue2025Member_75B7C841C273A0A30C1553BBDEF82FB0_label_en-US" xlink:label="lab_trs_A4.875SeniorUnsecuredNotesDue2025Member_75B7C841C273A0A30C1553BBDEF82FB0" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">4.875% Senior Unsecured Notes Due 2025 [Member]</link:label>
    <link:label id="lab_trs_A4.875SeniorUnsecuredNotesDue2025Member_75B7C841C273A0A30C1553BBDEF82FB0_documentation_en-US" xlink:label="lab_trs_A4.875SeniorUnsecuredNotesDue2025Member_75B7C841C273A0A30C1553BBDEF82FB0" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">4.875% Senior Unsecured Notes Due 2025 [Member]</link:label>
    <link:loc xlink:href="trs-20170930.xsd#trs_A4.875SeniorUnsecuredNotesDue2025Member" xlink:label="loc_trs_A4.875SeniorUnsecuredNotesDue2025Member_75B7C841C273A0A30C1553BBDEF82FB0" xlink:type="locator" />
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    <link:label id="lab_us-gaap_DebtInstrumentRedemptionPeriodAxis_E7A25A479107BE4BCE9953BBDEF82B24_terseLabel_en-US" xlink:label="lab_us-gaap_DebtInstrumentRedemptionPeriodAxis_E7A25A479107BE4BCE9953BBDEF82B24" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Debt Instrument, Redemption, Period [Axis]</link:label>
    <link:label id="lab_us-gaap_DebtInstrumentRedemptionPeriodAxis_E7A25A479107BE4BCE9953BBDEF82B24_label_en-US" xlink:label="lab_us-gaap_DebtInstrumentRedemptionPeriodAxis_E7A25A479107BE4BCE9953BBDEF82B24" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Instrument, Redemption, Period [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DebtInstrumentRedemptionPeriodAxis" xlink:label="loc_us-gaap_DebtInstrumentRedemptionPeriodAxis_E7A25A479107BE4BCE9953BBDEF82B24" xlink:type="locator" />
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    <link:label id="lab_us-gaap_DebtInstrumentRedemptionPeriodDomain_634D2E0AAC76F1ABE6AD53BBDEF8D4D5_label_en-US" xlink:label="lab_us-gaap_DebtInstrumentRedemptionPeriodDomain_634D2E0AAC76F1ABE6AD53BBDEF8D4D5" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Instrument, Redemption, Period [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DebtInstrumentRedemptionPeriodDomain" xlink:label="loc_us-gaap_DebtInstrumentRedemptionPeriodDomain_634D2E0AAC76F1ABE6AD53BBDEF8D4D5" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DebtInstrumentRedemptionPeriodDomain_634D2E0AAC76F1ABE6AD53BBDEF8D4D5" xlink:to="lab_us-gaap_DebtInstrumentRedemptionPeriodDomain_634D2E0AAC76F1ABE6AD53BBDEF8D4D5" xlink:type="arc" />
    <link:label id="lab_us-gaap_DebtInstrumentRedemptionPeriodOneMember_50860D470340C6ABE48F53BBDEF82B64_terseLabel_en-US" xlink:label="lab_us-gaap_DebtInstrumentRedemptionPeriodOneMember_50860D470340C6ABE48F53BBDEF82B64" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Prior to October 15, 2020 [Member]</link:label>
    <link:label id="lab_us-gaap_DebtInstrumentRedemptionPeriodOneMember_50860D470340C6ABE48F53BBDEF82B64_label_en-US" xlink:label="lab_us-gaap_DebtInstrumentRedemptionPeriodOneMember_50860D470340C6ABE48F53BBDEF82B64" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Instrument, Redemption, Period One [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DebtInstrumentRedemptionPeriodOneMember" xlink:label="loc_us-gaap_DebtInstrumentRedemptionPeriodOneMember_50860D470340C6ABE48F53BBDEF82B64" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DebtInstrumentRedemptionPeriodOneMember_50860D470340C6ABE48F53BBDEF82B64" xlink:to="lab_us-gaap_DebtInstrumentRedemptionPeriodOneMember_50860D470340C6ABE48F53BBDEF82B64" xlink:type="arc" />
    <link:label id="lab_us-gaap_DebtInstrumentRedemptionPeriodTwoMember_AA740AFAAFE063B8CB3A53BBDEF8F071_terseLabel_en-US" xlink:label="lab_us-gaap_DebtInstrumentRedemptionPeriodTwoMember_AA740AFAAFE063B8CB3A53BBDEF8F071" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">October 15, 2020 to October 14, 2021 [Member]</link:label>
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DebtInstrumentRedemptionPeriodTwoMember" xlink:label="loc_us-gaap_DebtInstrumentRedemptionPeriodTwoMember_AA740AFAAFE063B8CB3A53BBDEF8F071" xlink:type="locator" />
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    <link:label id="lab_trs_BankdebtandreceivablesfacilityMember_578237D0BD636DE5B03553BBDF818CEE_label_en-US" xlink:label="lab_trs_BankdebtandreceivablesfacilityMember_578237D0BD636DE5B03553BBDF818CEE" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Bank debt and receivables facility [Member]</link:label>
    <link:label id="lab_trs_BankdebtandreceivablesfacilityMember_578237D0BD636DE5B03553BBDF818CEE_documentation_en-US" xlink:label="lab_trs_BankdebtandreceivablesfacilityMember_578237D0BD636DE5B03553BBDF818CEE" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Contractual arrangement with a lender under which borrowings can be made up to a specific amount at any point in time, and under which borrowings outstanding may be either short-term or long-term, depending upon the particulars, inside the reporting entity's home country; and, collateralized debt obligation backed by, for example, but not limited to, pledge, mortgage or other lien on the entity's assets.</link:label>
    <link:loc xlink:href="trs-20170930.xsd#trs_BankdebtandreceivablesfacilityMember" xlink:label="loc_trs_BankdebtandreceivablesfacilityMember_578237D0BD636DE5B03553BBDF818CEE" xlink:type="locator" />
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    <link:label id="lab_trs_RevolvingCreditAndTermLoanFacilitiesMember_9BA39FF12D8E2902473A53BBDF81320E_terseLabel_en-US" xlink:label="lab_trs_RevolvingCreditAndTermLoanFacilitiesMember_9BA39FF12D8E2902473A53BBDF81320E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Revolving credit and term loan facilities [Member]</link:label>
    <link:label id="lab_trs_RevolvingCreditAndTermLoanFacilitiesMember_9BA39FF12D8E2902473A53BBDF81320E_label_en-US" xlink:label="lab_trs_RevolvingCreditAndTermLoanFacilitiesMember_9BA39FF12D8E2902473A53BBDF81320E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Revolving credit and term loan facilities [Member]</link:label>
    <link:label id="lab_trs_RevolvingCreditAndTermLoanFacilitiesMember_9BA39FF12D8E2902473A53BBDF81320E_documentation_en-US" xlink:label="lab_trs_RevolvingCreditAndTermLoanFacilitiesMember_9BA39FF12D8E2902473A53BBDF81320E" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Debt arrangement in which loan proceeds can continuously be obtained following repayments, but the total amount borrowed cannot exceed a specified maximum amount; as well as debt instruments with maturities ranging from five to ten years.</link:label>
    <link:loc xlink:href="trs-20170930.xsd#trs_RevolvingCreditAndTermLoanFacilitiesMember" xlink:label="loc_trs_RevolvingCreditAndTermLoanFacilitiesMember_9BA39FF12D8E2902473A53BBDF81320E" xlink:type="locator" />
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    <link:label id="lab_us-gaap_RevolvingCreditFacilityMember_FF91D22D997694DABA2753BBDF816733_terseLabel_en-US" xlink:label="lab_us-gaap_RevolvingCreditFacilityMember_FF91D22D997694DABA2753BBDF816733" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Revolving Credit Facility [Member]</link:label>
    <link:label id="lab_us-gaap_RevolvingCreditFacilityMember_FF91D22D997694DABA2753BBDF816733_label_en-US" xlink:label="lab_us-gaap_RevolvingCreditFacilityMember_FF91D22D997694DABA2753BBDF816733" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Revolving Credit Facility [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RevolvingCreditFacilityMember" xlink:label="loc_us-gaap_RevolvingCreditFacilityMember_FF91D22D997694DABA2753BBDF816733" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_RevolvingCreditFacilityMember_FF91D22D997694DABA2753BBDF816733" xlink:to="lab_us-gaap_RevolvingCreditFacilityMember_FF91D22D997694DABA2753BBDF816733" xlink:type="arc" />
    <link:label id="lab_trs_TermloanAfacilityMember_7A77BAF49A0B5B625F1F53BBDF8285A7_terseLabel_en-US" xlink:label="lab_trs_TermloanAfacilityMember_7A77BAF49A0B5B625F1F53BBDF8285A7" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">term loan A facility [Member]</link:label>
    <link:label id="lab_trs_TermloanAfacilityMember_7A77BAF49A0B5B625F1F53BBDF8285A7_label_en-US" xlink:label="lab_trs_TermloanAfacilityMember_7A77BAF49A0B5B625F1F53BBDF8285A7" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">term loan A facility [Member]</link:label>
    <link:label id="lab_trs_TermloanAfacilityMember_7A77BAF49A0B5B625F1F53BBDF8285A7_documentation_en-US" xlink:label="lab_trs_TermloanAfacilityMember_7A77BAF49A0B5B625F1F53BBDF8285A7" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">term loan A facility [Member]</link:label>
    <link:loc xlink:href="trs-20170930.xsd#trs_TermloanAfacilityMember" xlink:label="loc_trs_TermloanAfacilityMember_7A77BAF49A0B5B625F1F53BBDF8285A7" xlink:type="locator" />
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    <link:label id="lab_us-gaap_LetterOfCreditMember_6D1F6248E2905FE688E353BBDF82F4A1_terseLabel_en-US" xlink:label="lab_us-gaap_LetterOfCreditMember_6D1F6248E2905FE688E353BBDF82F4A1" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Letters of credit [Member]</link:label>
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    <link:label id="lab_us-gaap_LineOfCreditFacilityCapacityAvailableForSpecificPurposeOtherThanForTradePurchases_1D1A3C6FC0604C51AF6553BBDF8368E6_terseLabel_en-US" xlink:label="lab_us-gaap_LineOfCreditFacilityCapacityAvailableForSpecificPurposeOtherThanForTradePurchases_1D1A3C6FC0604C51AF6553BBDF8368E6" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Revolving Credit Facility, Capacity Available for Foreign Revolver Loans</link:label>
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LineOfCreditFacilityCapacityAvailableForSpecificPurposeOtherThanForTradePurchases" xlink:label="loc_us-gaap_LineOfCreditFacilityCapacityAvailableForSpecificPurposeOtherThanForTradePurchases_1D1A3C6FC0604C51AF6553BBDF8368E6" xlink:type="locator" />
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity" xlink:label="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_A0BFC539235DA4E33D7453BBDF88278F" xlink:type="locator" />
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    <link:label id="lab_trs_IncrementalDebtCommitmentsCapacity_910212808CD961EEDE6953BBDF88586A_documentation_en-US" xlink:label="lab_trs_IncrementalDebtCommitmentsCapacity_910212808CD961EEDE6953BBDF88586A" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Incremental debt commitments capacity.</link:label>
    <link:loc xlink:href="trs-20170930.xsd#trs_IncrementalDebtCommitmentsCapacity" xlink:label="loc_trs_IncrementalDebtCommitmentsCapacity_910212808CD961EEDE6953BBDF88586A" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_trs_IncrementalDebtCommitmentsCapacity_910212808CD961EEDE6953BBDF88586A" xlink:to="lab_trs_IncrementalDebtCommitmentsCapacity_910212808CD961EEDE6953BBDF88586A" xlink:type="arc" />
    <link:label id="lab_trs_NetLeverageRatio_CA100593610B49EBE8DE53BBDF880A40_terseLabel_en-US" xlink:label="lab_trs_NetLeverageRatio_CA100593610B49EBE8DE53BBDF880A40" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Net leverage ratio</link:label>
    <link:label id="lab_trs_NetLeverageRatio_CA100593610B49EBE8DE53BBDF880A40_label_en-US" xlink:label="lab_trs_NetLeverageRatio_CA100593610B49EBE8DE53BBDF880A40" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Net leverage ratio</link:label>
    <link:label id="lab_trs_NetLeverageRatio_CA100593610B49EBE8DE53BBDF880A40_documentation_en-US" xlink:label="lab_trs_NetLeverageRatio_CA100593610B49EBE8DE53BBDF880A40" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Net leverage ratio, as defined</link:label>
    <link:loc xlink:href="trs-20170930.xsd#trs_NetLeverageRatio" xlink:label="loc_trs_NetLeverageRatio_CA100593610B49EBE8DE53BBDF880A40" xlink:type="locator" />
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    <link:label id="lab_trs_LetterOfCreditMaximumBorrowingCapacity_57A17B1A3375B8E4AC7A53BBDF886C4A_terseLabel_en-US" xlink:label="lab_trs_LetterOfCreditMaximumBorrowingCapacity_57A17B1A3375B8E4AC7A53BBDF886C4A" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Letters of Credit, Maximum Borrowing Capacity</link:label>
    <link:label id="lab_trs_LetterOfCreditMaximumBorrowingCapacity_57A17B1A3375B8E4AC7A53BBDF886C4A_label_en-US" xlink:label="lab_trs_LetterOfCreditMaximumBorrowingCapacity_57A17B1A3375B8E4AC7A53BBDF886C4A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Letter of Credit, Maximum Borrowing Capacity</link:label>
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