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    <link:label id="lab_us-gaap_AccountsReceivableNetCurrent_FB92F26C33FA978A9742000DCF671599_terseLabel_en-US" xlink:label="lab_us-gaap_AccountsReceivableNetCurrent_FB92F26C33FA978A9742000DCF671599" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Receivables, net of allowances of $11,279 in 2020 and $8,072 in 2019</link:label>
    <link:label id="lab_us-gaap_AccountsReceivableNetCurrent_FB92F26C33FA978A9742000DCF671599_label_en-US" xlink:label="lab_us-gaap_AccountsReceivableNetCurrent_FB92F26C33FA978A9742000DCF671599" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Accounts Receivable, after Allowance for Credit Loss, Current</link:label>
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    <link:label id="lab_us-gaap_InventoryNet_AF0D91DD77EB47F51B56000DCF67A964_verboseLabel_en-US" xlink:label="lab_us-gaap_InventoryNet_AF0D91DD77EB47F51B56000DCF67A964" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Inventories, net</link:label>
    <link:label id="lab_us-gaap_InventoryNet_AF0D91DD77EB47F51B56000DCF67A964_label_en-US" xlink:label="lab_us-gaap_InventoryNet_AF0D91DD77EB47F51B56000DCF67A964" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Inventory, Net</link:label>
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    <link:label id="lab_us-gaap_PrepaidExpenseAndOtherAssetsCurrent_0BFD3819FCB0EEF24298000DCF6787ED_label_en-US" xlink:label="lab_us-gaap_PrepaidExpenseAndOtherAssetsCurrent_0BFD3819FCB0EEF24298000DCF6787ED" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Prepaid Expense and Other Assets, Current</link:label>
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    <link:label id="lab_us-gaap_AssetsCurrent_133E317E3E650192095F000DCF6751EE_label_en-US" xlink:label="lab_us-gaap_AssetsCurrent_133E317E3E650192095F000DCF6751EE" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Assets, Current</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AssetsCurrent" xlink:label="loc_us-gaap_AssetsCurrent_133E317E3E650192095F000DCF6751EE" xlink:type="locator" />
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    <link:label id="lab_us-gaap_PropertyPlantAndEquipmentNet_6D88E89E6F3216D6129F000DCF6798BB_verboseLabel_en-US" xlink:label="lab_us-gaap_PropertyPlantAndEquipmentNet_6D88E89E6F3216D6129F000DCF6798BB" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Property, plant and equipment, net of accumulated depreciation of $431,760 in 2020 and $426,722 in 2019</link:label>
    <link:label id="lab_us-gaap_PropertyPlantAndEquipmentNet_6D88E89E6F3216D6129F000DCF6798BB_label_en-US" xlink:label="lab_us-gaap_PropertyPlantAndEquipmentNet_6D88E89E6F3216D6129F000DCF6798BB" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Property, Plant and Equipment, Net</link:label>
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    <link:label id="lab_us-gaap_Goodwill_D47628737016D9B2014F000DCF68E251_verboseLabel_en-US" xlink:label="lab_us-gaap_Goodwill_D47628737016D9B2014F000DCF68E251" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Goodwill</link:label>
    <link:label id="lab_us-gaap_Goodwill_D47628737016D9B2014F000DCF68E251_label_en-US" xlink:label="lab_us-gaap_Goodwill_D47628737016D9B2014F000DCF68E251" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Goodwill</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_Goodwill" xlink:label="loc_us-gaap_Goodwill_D47628737016D9B2014F000DCF68E251" xlink:type="locator" />
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    <link:label id="lab_us-gaap_IntangibleAssetsNetExcludingGoodwill_7193A0C64BFFA6B6AD53000DCF685388_verboseLabel_en-US" xlink:label="lab_us-gaap_IntangibleAssetsNetExcludingGoodwill_7193A0C64BFFA6B6AD53000DCF685388" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Intangible assets, net</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IntangibleAssetsNetExcludingGoodwill" xlink:label="loc_us-gaap_IntangibleAssetsNetExcludingGoodwill_7193A0C64BFFA6B6AD53000DCF685388" xlink:type="locator" />
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    <link:label id="lab_us-gaap_Assets_F869B587DE735807EA25000DCF68DAE1_label_en-US" xlink:label="lab_us-gaap_Assets_F869B587DE735807EA25000DCF68DAE1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Assets</link:label>
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    <link:label id="lab_us-gaap_LiabilitiesAndStockholdersEquityAbstract_3840BAC64DA59745FCE5000DCF6862B8_label_en-US" xlink:label="lab_us-gaap_LiabilitiesAndStockholdersEquityAbstract_3840BAC64DA59745FCE5000DCF6862B8" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Liabilities and Equity [Abstract]</link:label>
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    <link:label id="lab_us-gaap_AccountsPayableCurrent_8C2B66944498EC4A11E6000DCF682927_verboseLabel_en-US" xlink:label="lab_us-gaap_AccountsPayableCurrent_8C2B66944498EC4A11E6000DCF682927" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Accounts payable</link:label>
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    <link:label id="lab_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_2D378DE6B8C571F44458EC59EA83D611_terseLabel_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_2D378DE6B8C571F44458EC59EA83D611" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Cash provided (required) by investing activities:</link:label>
    <link:label id="lab_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_2D378DE6B8C571F44458EC59EA83D611_label_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_2D378DE6B8C571F44458EC59EA83D611" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Net Cash Provided by (Used in) Investing Activities [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract" xlink:label="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_2D378DE6B8C571F44458EC59EA83D611" xlink:type="locator" />
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    <link:label id="lab_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_93347AF43685A822E703EC59EA8360E6_negatedLabel_en-US" xlink:label="lab_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_93347AF43685A822E703EC59EA8360E6" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Capital expenditures</link:label>
    <link:label id="lab_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_93347AF43685A822E703EC59EA8360E6_label_en-US" xlink:label="lab_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_93347AF43685A822E703EC59EA8360E6" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Payments to Acquire Property, Plant, and Equipment</link:label>
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    <link:label id="lab_us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment_98E131F6D33088E0AB10EC59EA8433ED_terseLabel_en-US" xlink:label="lab_us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment_98E131F6D33088E0AB10EC59EA8433ED" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Proceeds from sale of fixed assets</link:label>
    <link:label id="lab_us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment_98E131F6D33088E0AB10EC59EA8433ED_label_en-US" xlink:label="lab_us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment_98E131F6D33088E0AB10EC59EA8433ED" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Proceeds from Sale of Property, Plant, and Equipment</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment" xlink:label="loc_us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment_98E131F6D33088E0AB10EC59EA8433ED" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment_98E131F6D33088E0AB10EC59EA8433ED" xlink:to="lab_us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment_98E131F6D33088E0AB10EC59EA8433ED" xlink:type="arc" />
    <link:label id="lab_us-gaap_NetCashProvidedByUsedInInvestingActivities_E7F1887571AE50BA1AC4EC59EA84B6D0_totalLabel_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInInvestingActivities_E7F1887571AE50BA1AC4EC59EA84B6D0" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Net cash required by investing activities</link:label>
    <link:label id="lab_us-gaap_NetCashProvidedByUsedInInvestingActivities_E7F1887571AE50BA1AC4EC59EA84B6D0_label_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInInvestingActivities_E7F1887571AE50BA1AC4EC59EA84B6D0" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Net Cash Provided by (Used in) Investing Activities</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivities" xlink:label="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_E7F1887571AE50BA1AC4EC59EA84B6D0" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_E7F1887571AE50BA1AC4EC59EA84B6D0" xlink:to="lab_us-gaap_NetCashProvidedByUsedInInvestingActivities_E7F1887571AE50BA1AC4EC59EA84B6D0" xlink:type="arc" />
    <link:label id="lab_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_FA2103BDD5540DAA05FDEC59EA840DC8_terseLabel_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_FA2103BDD5540DAA05FDEC59EA840DC8" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Cash provided (required) by financing activities:</link:label>
    <link:label id="lab_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_FA2103BDD5540DAA05FDEC59EA840DC8_label_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_FA2103BDD5540DAA05FDEC59EA840DC8" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Net Cash Provided by (Used in) Financing Activities [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract" xlink:label="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_FA2103BDD5540DAA05FDEC59EA840DC8" xlink:type="locator" />
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    <link:label id="lab_us-gaap_PaymentsOfDebtIssuanceCosts_207150CD28A61465EBB7EC59EA84A2A5_label_en-US" xlink:label="lab_us-gaap_PaymentsOfDebtIssuanceCosts_207150CD28A61465EBB7EC59EA84A2A5" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Payments of Debt Issuance Costs</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PaymentsOfDebtIssuanceCosts" xlink:label="loc_us-gaap_PaymentsOfDebtIssuanceCosts_207150CD28A61465EBB7EC59EA84A2A5" xlink:type="locator" />
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    <link:label id="lab_us-gaap_RepaymentsOfLongTermDebt_0BAFAE3916A2E649F280EC59EA84D7AB_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_RepaymentsOfLongTermDebt_0BAFAE3916A2E649F280EC59EA84D7AB" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Repayment of long-term debt</link:label>
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RepaymentsOfLongTermDebt" xlink:label="loc_us-gaap_RepaymentsOfLongTermDebt_0BAFAE3916A2E649F280EC59EA84D7AB" xlink:type="locator" />
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    <link:label id="lab_us-gaap_RepaymentsOfLongTermCapitalLeaseObligations_7528814394F5A4B6CC2CEC59EA85AA77_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_RepaymentsOfLongTermCapitalLeaseObligations_7528814394F5A4B6CC2CEC59EA85AA77" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Payment of finance lease obligations</link:label>
    <link:label id="lab_us-gaap_RepaymentsOfLongTermCapitalLeaseObligations_7528814394F5A4B6CC2CEC59EA85AA77_label_en-US" xlink:label="lab_us-gaap_RepaymentsOfLongTermCapitalLeaseObligations_7528814394F5A4B6CC2CEC59EA85AA77" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Repayments of Long-term Capital Lease Obligations</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RepaymentsOfLongTermCapitalLeaseObligations" xlink:label="loc_us-gaap_RepaymentsOfLongTermCapitalLeaseObligations_7528814394F5A4B6CC2CEC59EA85AA77" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_RepaymentsOfLongTermCapitalLeaseObligations_7528814394F5A4B6CC2CEC59EA85AA77" xlink:to="lab_us-gaap_RepaymentsOfLongTermCapitalLeaseObligations_7528814394F5A4B6CC2CEC59EA85AA77" xlink:type="arc" />
    <link:label id="lab_us-gaap_PaymentsRelatedToTaxWithholdingForShareBasedCompensation_D730C9DE43FAC8C7D9FAEC59EA856736_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_PaymentsRelatedToTaxWithholdingForShareBasedCompensation_D730C9DE43FAC8C7D9FAEC59EA856736" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Payments related to taxes withheld on stock-based compensation</link:label>
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    <link:label id="lab_us-gaap_NetCashProvidedByUsedInFinancingActivities_5E39BB5E4153EA940C0CEC59EA853E34_totalLabel_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInFinancingActivities_5E39BB5E4153EA940C0CEC59EA853E34" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Net cash required by financing activities</link:label>
    <link:label id="lab_us-gaap_NetCashProvidedByUsedInFinancingActivities_5E39BB5E4153EA940C0CEC59EA853E34_label_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInFinancingActivities_5E39BB5E4153EA940C0CEC59EA853E34" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Net Cash Provided by (Used in) Financing Activities</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivities" xlink:label="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_5E39BB5E4153EA940C0CEC59EA853E34" xlink:type="locator" />
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    <link:label id="lab_us-gaap_EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_62E7C2D50E13650594C1EC59EA858885_terseLabel_en-US" xlink:label="lab_us-gaap_EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_62E7C2D50E13650594C1EC59EA858885" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Effect of exchange rate changes on cash and cash equivalents</link:label>
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