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    <link:label id="lab_us-gaap_LineOfCredit_EEFEC46C2AF71D7AB27FB0313980CD08_label_en-US" xlink:label="lab_us-gaap_LineOfCredit_EEFEC46C2AF71D7AB27FB0313980CD08" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Long-term Line of Credit</link:label>
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    <link:label id="lab_b_DebtInstrumentCovenantConsolidatedSeniorDebttoConsolidatedEBITDA_FF26ACD2A3A106EF1F15B03139806879_terseLabel_en-US" xlink:label="lab_b_DebtInstrumentCovenantConsolidatedSeniorDebttoConsolidatedEBITDA_FF26ACD2A3A106EF1F15B03139806879" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Debt Instrument, Covenant, Consolidated Senior Credit to Consolidated EBITDA (not more than)</link:label>
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    <link:loc xlink:href="b-20171231.xsd#b_AccumulatedOtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansNetActuarialGainLossNetOfTax" xlink:label="loc_b_AccumulatedOtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansNetActuarialGainLossNetOfTax_5163511BA759061C94C966EBD231F25A" xlink:type="locator" />
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    <link:label id="lab_b_AccumulatedOtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansPriorServiceCostCreditNetOfTax_AC479D0CA154EE42D2FF66EBD2310879_negatedTerseLabel_en-US" xlink:label="lab_b_AccumulatedOtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansPriorServiceCostCreditNetOfTax_AC479D0CA154EE42D2FF66EBD2310879" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Prior service costs</link:label>
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    <link:label id="lab_b_AccumulatedOtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansPriorServiceCostCreditNetOfTax_AC479D0CA154EE42D2FF66EBD2310879_documentation_en-US" xlink:label="lab_b_AccumulatedOtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansPriorServiceCostCreditNetOfTax_AC479D0CA154EE42D2FF66EBD2310879" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Accumulated Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Prior Service Cost (Credit), Net of Tax</link:label>
    <link:loc xlink:href="b-20171231.xsd#b_AccumulatedOtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansPriorServiceCostCreditNetOfTax" xlink:label="loc_b_AccumulatedOtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansPriorServiceCostCreditNetOfTax_AC479D0CA154EE42D2FF66EBD2310879" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_b_AccumulatedOtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansPriorServiceCostCreditNetOfTax_AC479D0CA154EE42D2FF66EBD2310879" xlink:to="lab_b_AccumulatedOtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansPriorServiceCostCreditNetOfTax_AC479D0CA154EE42D2FF66EBD2310879" xlink:type="arc" />
    <link:label id="lab_us-gaap_ScheduleOfShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeTable_6CB96210DA544E7F78F3677CF1C43A22_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeTable_6CB96210DA544E7F78F3677CF1C43A22" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Share-based Compensation, Shares Authorized under Stock Option Plans, by Exercise Price Range [Table]</link:label>
    <link:label id="lab_us-gaap_ScheduleOfShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeTable_6CB96210DA544E7F78F3677CF1C43A22_label_en-US" xlink:label="lab_us-gaap_ScheduleOfShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeTable_6CB96210DA544E7F78F3677CF1C43A22" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Schedule of Share-based Compensation, Shares Authorized under Stock Option Plans, by Exercise Price Range [Table]</link:label>
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    <link:label id="lab_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis_2ED7C0CC2F69518296CB677CF1C498DF_terseLabel_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis_2ED7C0CC2F69518296CB677CF1C498DF" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Share-based Compensation, Shares Authorized under Stock Option Plans, by Exercise Price Range [Axis]</link:label>
    <link:label id="lab_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis_2ED7C0CC2F69518296CB677CF1C498DF_label_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis_2ED7C0CC2F69518296CB677CF1C498DF" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Exercise Price Range [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis" xlink:label="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis_2ED7C0CC2F69518296CB677CF1C498DF" xlink:type="locator" />
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    <link:label id="lab_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeDomain_4A7563351EAB7BC3783B677CF1C46257_terseLabel_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeDomain_4A7563351EAB7BC3783B677CF1C46257" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Domain]</link:label>
    <link:label id="lab_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeDomain_4A7563351EAB7BC3783B677CF1C46257_label_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeDomain_4A7563351EAB7BC3783B677CF1C46257" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeDomain" xlink:label="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeDomain_4A7563351EAB7BC3783B677CF1C46257" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeDomain_4A7563351EAB7BC3783B677CF1C46257" xlink:to="lab_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeDomain_4A7563351EAB7BC3783B677CF1C46257" xlink:type="arc" />
    <link:label id="lab_b_RangeOneMember_DD365780B9E1F41CB814677CF1C4B64E_terseLabel_en-US" xlink:label="lab_b_RangeOneMember_DD365780B9E1F41CB814677CF1C4B64E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">$11.45 to $15.83</link:label>
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    <link:label id="lab_b_RangeOneMember_DD365780B9E1F41CB814677CF1C4B64E_documentation_en-US" xlink:label="lab_b_RangeOneMember_DD365780B9E1F41CB814677CF1C4B64E" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Range One [Member]</link:label>
    <link:loc xlink:href="b-20171231.xsd#b_RangeOneMember" xlink:label="loc_b_RangeOneMember_DD365780B9E1F41CB814677CF1C4B64E" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_b_RangeOneMember_DD365780B9E1F41CB814677CF1C4B64E" xlink:to="lab_b_RangeOneMember_DD365780B9E1F41CB814677CF1C4B64E" xlink:type="arc" />
    <link:label id="lab_b_RangeTwoMember_60B53BD08BCDC9BFFDCC677CF1C4F029_terseLabel_en-US" xlink:label="lab_b_RangeTwoMember_60B53BD08BCDC9BFFDCC677CF1C4F029" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">$20.69 to $26.32</link:label>
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    <link:label id="lab_b_RangeTwoMember_60B53BD08BCDC9BFFDCC677CF1C4F029_documentation_en-US" xlink:label="lab_b_RangeTwoMember_60B53BD08BCDC9BFFDCC677CF1C4F029" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Range Two [Member]</link:label>
    <link:loc xlink:href="b-20171231.xsd#b_RangeTwoMember" xlink:label="loc_b_RangeTwoMember_60B53BD08BCDC9BFFDCC677CF1C4F029" xlink:type="locator" />
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    <link:label id="lab_b_RangeThreeMember_360E35575710A2552242677CF1C479DC_documentation_en-US" xlink:label="lab_b_RangeThreeMember_360E35575710A2552242677CF1C479DC" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Range Three [Member]</link:label>
    <link:loc xlink:href="b-20171231.xsd#b_RangeThreeMember" xlink:label="loc_b_RangeThreeMember_360E35575710A2552242677CF1C479DC" xlink:type="locator" />
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    <link:label id="lab_us-gaap_IncreaseDecreaseInOtherOperatingCapitalNet_31F27633718F30C19107A0A89C8893F5_negatedLabel_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInOtherOperatingCapitalNet_31F27633718F30C19107A0A89C8893F5" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Other</link:label>
    <link:label id="lab_us-gaap_IncreaseDecreaseInOtherOperatingCapitalNet_31F27633718F30C19107A0A89C8893F5_label_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInOtherOperatingCapitalNet_31F27633718F30C19107A0A89C8893F5" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Increase (Decrease) in Other Operating Assets and Liabilities, Net</link:label>
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    <link:label id="lab_us-gaap_NetCashProvidedByUsedInOperatingActivities_6BE504FA9AC115D59160A0A89C88AADE_label_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInOperatingActivities_6BE504FA9AC115D59160A0A89C88AADE" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Net Cash Provided by (Used in) Operating Activities</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:label="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_6BE504FA9AC115D59160A0A89C88AADE" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_6BE504FA9AC115D59160A0A89C88AADE" xlink:to="lab_us-gaap_NetCashProvidedByUsedInOperatingActivities_6BE504FA9AC115D59160A0A89C88AADE" xlink:type="arc" />
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    <link:label id="lab_us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment_DB423B86AA168F6C00BEA0A89C89D2C7_terseLabel_en-US" xlink:label="lab_us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment_DB423B86AA168F6C00BEA0A89C89D2C7" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Proceeds from disposition of property, plant and equipment</link:label>
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    <link:label id="lab_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_55B02F230F7EECECDB98A0A89C8902CB_negatedLabel_en-US" xlink:label="lab_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_55B02F230F7EECECDB98A0A89C8902CB" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Capital expenditures</link:label>
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    <link:label id="lab_us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired_B2D53CF61BFB807DC4B5A0A89C89D2F1_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired_B2D53CF61BFB807DC4B5A0A89C89D2F1" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Business acquisitions, net of cash acquired</link:label>
    <link:label id="lab_us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired_B2D53CF61BFB807DC4B5A0A89C89D2F1_label_en-US" xlink:label="lab_us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired_B2D53CF61BFB807DC4B5A0A89C89D2F1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Payments to Acquire Businesses, Net of Cash Acquired</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired" xlink:label="loc_us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired_B2D53CF61BFB807DC4B5A0A89C89D2F1" xlink:type="locator" />
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    <link:label id="lab_b_ComponentRepairProgramPayments_042FB2686227EFB37B38A0A89C89ED02_negatedTerseLabel_en-US" xlink:label="lab_b_ComponentRepairProgramPayments_042FB2686227EFB37B38A0A89C89ED02" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Component Repair Program payments</link:label>
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    <link:label id="lab_us-gaap_PaymentsForProceedsFromOtherInvestingActivities_63724A416C679F0F2E62A0A89C89EC97_negatedLabel_en-US" xlink:label="lab_us-gaap_PaymentsForProceedsFromOtherInvestingActivities_63724A416C679F0F2E62A0A89C89EC97" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Other</link:label>
    <link:label id="lab_us-gaap_PaymentsForProceedsFromOtherInvestingActivities_63724A416C679F0F2E62A0A89C89EC97_label_en-US" xlink:label="lab_us-gaap_PaymentsForProceedsFromOtherInvestingActivities_63724A416C679F0F2E62A0A89C89EC97" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Payments for (Proceeds from) Other Investing Activities</link:label>
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    <link:label id="lab_us-gaap_ProceedsFromRepaymentsOfOtherDebt_0A394C8D3956572C088AA0A89C89B0D0_terseLabel_en-US" xlink:label="lab_us-gaap_ProceedsFromRepaymentsOfOtherDebt_0A394C8D3956572C088AA0A89C89B0D0" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Net change in other borrowings</link:label>
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