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| | <loc xlink:type="locator" xlink:href="trex-20220930.xsd#trex_CreditFacilityOneDomain" xlink:label="loc_trex_CreditFacilityOneDomain_1562886"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_trex_CreditFacilityOneAxis_1562885" xlink:to="loc_trex_CreditFacilityOneDomain_1562886" use="optional" order="19"/> |
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| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_trex_CreditFacilityOneAxis_1562885" xlink:to="loc_trex_CreditFacilityOneDomain_1562886_default" use="optional" order="20"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LetterOfCreditMember" xlink:label="loc_us-gaap_LetterOfCreditMember_1562887"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_trex_CreditFacilityOneDomain_1562886" xlink:to="loc_us-gaap_LetterOfCreditMember_1562887" use="optional" order="21"/> |
| | <loc xlink:type="locator" xlink:href="trex-20220930.xsd#trex_SwinglineLetterOfCreditMember" xlink:label="loc_trex_SwinglineLetterOfCreditMember_1562889"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_trex_CreditFacilityOneDomain_1562886" xlink:to="loc_trex_SwinglineLetterOfCreditMember_1562889" use="optional" order="22"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CreditFacilityAxis" xlink:label="loc_us-gaap_CreditFacilityAxis_344"/> |
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| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CreditFacilityDomain" xlink:label="loc_us-gaap_CreditFacilityDomain_345"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_CreditFacilityAxis_344" xlink:to="loc_us-gaap_CreditFacilityDomain_345" use="optional" order="24"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CreditFacilityDomain" xlink:label="loc_us-gaap_CreditFacilityDomain_345_default"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_CreditFacilityAxis_344" xlink:to="loc_us-gaap_CreditFacilityDomain_345_default" use="optional" order="25"/> |
| | <loc xlink:type="locator" xlink:href="trex-20220930.xsd#trex_RevolverLoansPortionEffectiveOneJanuaryThroughThirtyJuneMember" xlink:label="loc_trex_RevolverLoansPortionEffectiveOneJanuaryThroughThirtyJuneMember_354"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_345" xlink:to="loc_trex_RevolverLoansPortionEffectiveOneJanuaryThroughThirtyJuneMember_354" use="optional" order="26"/> |
| | <loc xlink:type="locator" xlink:href="trex-20220930.xsd#trex_RevolverLoansPortionEffectiveOneJulyThroughThirtyFirstDecemberMember" xlink:label="loc_trex_RevolverLoansPortionEffectiveOneJulyThroughThirtyFirstDecemberMember_355"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_345" xlink:to="loc_trex_RevolverLoansPortionEffectiveOneJulyThroughThirtyFirstDecemberMember_355" use="optional" order="27"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_RevolvingCreditFacilityMember" xlink:label="loc_us-gaap_RevolvingCreditFacilityMember_356"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_345" xlink:to="loc_us-gaap_RevolvingCreditFacilityMember_356" use="optional" order="28"/> |
| | <loc xlink:type="locator" xlink:href="trex-20220930.xsd#trex_AgreementAxis" xlink:label="loc_trex_AgreementAxis_1562878"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LineOfCreditFacilityTable_349" xlink:to="loc_trex_AgreementAxis_1562878" use="optional" order="29"/> |
| | <loc xlink:type="locator" xlink:href="trex-20220930.xsd#trex_AgreementDomain" xlink:label="loc_trex_AgreementDomain_1562880"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_trex_AgreementAxis_1562878" xlink:to="loc_trex_AgreementDomain_1562880" use="optional" order="30"/> |
| | <loc xlink:type="locator" xlink:href="trex-20220930.xsd#trex_AgreementDomain" xlink:label="loc_trex_AgreementDomain_1562880_default"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_trex_AgreementAxis_1562878" xlink:to="loc_trex_AgreementDomain_1562880_default" use="optional" order="31"/> |
| | <loc xlink:type="locator" xlink:href="trex-20220930.xsd#trex_FifthAmendmentAndRestatedAgreementMember" xlink:label="loc_trex_FifthAmendmentAndRestatedAgreementMember_1562881"/> |
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| | <loc xlink:type="locator" xlink:href="trex-20220930.xsd#trex_LineOfCreditFacilityAdditionalBorrowingCapacity" xlink:label="loc_trex_LineOfCreditFacilityAdditionalBorrowingCapacity_802770"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_348" xlink:to="loc_trex_LineOfCreditFacilityAdditionalBorrowingCapacity_802770" use="optional" order="33"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity" xlink:label="loc_us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity_362"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_348" xlink:to="loc_us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity_362" use="optional" order="34"/> |
| | <loc xlink:type="locator" xlink:href="trex-20220930.xsd#trex_NumberOfBusinessDaysWithinWhichLenderMayRaiseObjectionsToAmendment" xlink:label="loc_trex_NumberOfBusinessDaysWithinWhichLenderMayRaiseObjectionsToAmendment_1562877"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_348" xlink:to="loc_trex_NumberOfBusinessDaysWithinWhichLenderMayRaiseObjectionsToAmendment_1562877" use="optional" order="35"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtInstrumentDescriptionOfVariableRateBasis" xlink:label="loc_us-gaap_DebtInstrumentDescriptionOfVariableRateBasis_1563943"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_348" xlink:to="loc_us-gaap_DebtInstrumentDescriptionOfVariableRateBasis_1563943" use="optional" order="36"/> |
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| <definitionLink xlink:type="extended" xlink:role="http://www.trex.com/role/LeasesAdditionalInformationDetail"> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_StatementLineItems" xlink:label="loc_us-gaap_StatementLineItems_378483"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_OperatingLeaseCost" xlink:label="loc_us-gaap_OperatingLeaseCost_378456"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_378483" xlink:to="loc_us-gaap_OperatingLeaseCost_378456" use="optional" order="1"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_OperatingLeaseWeightedAverageRemainingLeaseTerm1" xlink:label="loc_us-gaap_OperatingLeaseWeightedAverageRemainingLeaseTerm1_378611"/> |
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| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_StatementTable" xlink:label="loc_us-gaap_StatementTable_378480"/> |
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| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_StatementClassOfStockAxis" xlink:label="loc_us-gaap_StatementClassOfStockAxis_378481"/> |
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| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_RangeAxis" xlink:label="loc_srt_RangeAxis_378484"/> |
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| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_MinimumMember" xlink:label="loc_srt_MinimumMember_378487"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_378485" xlink:to="loc_srt_MinimumMember_378487" use="optional" order="10"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_MaximumMember" xlink:label="loc_srt_MaximumMember_378486"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_378485" xlink:to="loc_srt_MaximumMember_378486" use="optional" order="11"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_OperatingLeaseWeightedAverageDiscountRatePercent" xlink:label="loc_us-gaap_OperatingLeaseWeightedAverageDiscountRatePercent_378455"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_378483" xlink:to="loc_us-gaap_OperatingLeaseWeightedAverageDiscountRatePercent_378455" use="optional" order="12"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LessorOperatingLeaseTermOfContract" xlink:label="loc_us-gaap_LessorOperatingLeaseTermOfContract_378457"/> |
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| <definitionLink xlink:type="extended" xlink:role="http://www.trex.com/role/LeasesSupplementalCashFlowInformationToOperatingLeasesDetails"> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_StatementLineItems" xlink:label="loc_us-gaap_StatementLineItems_378383"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_OperatingLeaseLiability" xlink:label="loc_us-gaap_OperatingLeaseLiability_378424"/> |
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| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_StatementClassOfStockAxis" xlink:label="loc_us-gaap_StatementClassOfStockAxis_563044"/> |
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| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ClassOfStockDomain" xlink:label="loc_us-gaap_ClassOfStockDomain_563045"/> |
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| | <loc xlink:type="locator" xlink:href="trex-20220930.xsd#trex_SupplementalBalanceSheetInformationAbstract" xlink:label="loc_trex_SupplementalBalanceSheetInformationAbstract_378420"/> |
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| | <loc xlink:type="locator" xlink:href="trex-20220930.xsd#trex_PercentSensitivityChangeInExpectedSurfaceFlakingClaims" xlink:label="loc_trex_PercentSensitivityChangeInExpectedSurfaceFlakingClaims_704"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_trex_ScheduleOfCommitmentsAndContingenciesLineItems_687" xlink:to="loc_trex_PercentSensitivityChangeInExpectedSurfaceFlakingClaims_704" use="optional" order="37"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AreaOfLand" xlink:label="loc_us-gaap_AreaOfLand_1562884"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_trex_ScheduleOfCommitmentsAndContingenciesLineItems_687" xlink:to="loc_us-gaap_AreaOfLand_1562884" use="optional" order="38"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LandAndLandImprovements" xlink:label="loc_us-gaap_LandAndLandImprovements_1562890"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_trex_ScheduleOfCommitmentsAndContingenciesLineItems_687" xlink:to="loc_us-gaap_LandAndLandImprovements_1562890" use="optional" order="39"/> |
| | </definitionLink> |
| <definitionLink xlink:type="extended" xlink:role="http://www.trex.com/role/CommitmentsAndContingenciesSummaryOfReconciliationOfCompanysResidentialProductWarrantyReserveDetail"> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ProductWarrantyLiabilityLineItems" xlink:label="loc_us-gaap_ProductWarrantyLiabilityLineItems_711"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_StandardProductWarrantyAccrualPayments" xlink:label="loc_us-gaap_StandardProductWarrantyAccrualPayments_719"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ProductWarrantyLiabilityLineItems_711" xlink:to="loc_us-gaap_StandardProductWarrantyAccrualPayments_719" use="optional" order="1"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ProductWarrantyLiabilityTable" xlink:label="loc_us-gaap_ProductWarrantyLiabilityTable_712"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ProductWarrantyLiabilityLineItems_711" xlink:to="loc_us-gaap_ProductWarrantyLiabilityTable_712" xbrldt:contextElement="segment" xbrldt:closed="true" use="optional" order="2"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ContingentConsiderationByTypeAxis" xlink:label="loc_us-gaap_ContingentConsiderationByTypeAxis_709"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ProductWarrantyLiabilityTable_712" xlink:to="loc_us-gaap_ContingentConsiderationByTypeAxis_709" use="optional" order="3"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ContingentConsiderationTypeDomain" xlink:label="loc_us-gaap_ContingentConsiderationTypeDomain_710"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ContingentConsiderationByTypeAxis_709" xlink:to="loc_us-gaap_ContingentConsiderationTypeDomain_710" use="optional" order="4"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ContingentConsiderationTypeDomain" xlink:label="loc_us-gaap_ContingentConsiderationTypeDomain_710_default"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ContingentConsiderationByTypeAxis_709" xlink:to="loc_us-gaap_ContingentConsiderationTypeDomain_710_default" use="optional" order="5"/> |
| | <loc xlink:type="locator" xlink:href="trex-20220930.xsd#trex_SurfaceFlakingMember" xlink:label="loc_trex_SurfaceFlakingMember_715"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ContingentConsiderationTypeDomain_710" xlink:to="loc_trex_SurfaceFlakingMember_715" use="optional" order="6"/> |
| | <loc xlink:type="locator" xlink:href="trex-20220930.xsd#trex_OtherResidentialMember" xlink:label="loc_trex_OtherResidentialMember_716"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ContingentConsiderationTypeDomain_710" xlink:to="loc_trex_OtherResidentialMember_716" use="optional" order="7"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ValuationAllowancesAndReservesTypeAxis" xlink:label="loc_us-gaap_ValuationAllowancesAndReservesTypeAxis_714"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ProductWarrantyLiabilityTable_712" xlink:to="loc_us-gaap_ValuationAllowancesAndReservesTypeAxis_714" use="optional" order="8"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ValuationAllowancesAndReservesDomain" xlink:label="loc_us-gaap_ValuationAllowancesAndReservesDomain_713"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ValuationAllowancesAndReservesTypeAxis_714" xlink:to="loc_us-gaap_ValuationAllowancesAndReservesDomain_713" use="optional" order="9"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ValuationAllowancesAndReservesDomain" xlink:label="loc_us-gaap_ValuationAllowancesAndReservesDomain_713_default"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ValuationAllowancesAndReservesTypeAxis_714" xlink:to="loc_us-gaap_ValuationAllowancesAndReservesDomain_713_default" use="optional" order="10"/> |
| | <loc xlink:type="locator" xlink:href="trex-20220930.xsd#trex_SurfaceFlakingWarrantyReserveMember" xlink:label="loc_trex_SurfaceFlakingWarrantyReserveMember_721"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ValuationAllowancesAndReservesDomain_713" xlink:to="loc_trex_SurfaceFlakingWarrantyReserveMember_721" use="optional" order="11"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_StandardProductWarrantyAccrualPreexistingIncreaseDecrease" xlink:label="loc_us-gaap_StandardProductWarrantyAccrualPreexistingIncreaseDecrease_718"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ProductWarrantyLiabilityLineItems_711" xlink:to="loc_us-gaap_StandardProductWarrantyAccrualPreexistingIncreaseDecrease_718" use="optional" order="12"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_StandardProductWarrantyAccrual" xlink:label="loc_us-gaap_StandardProductWarrantyAccrual_717"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ProductWarrantyLiabilityLineItems_711" xlink:to="loc_us-gaap_StandardProductWarrantyAccrual_717" use="optional" order="13"/> |
| | </definitionLink> |
| </linkbase> |