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    <link:label id="lab_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_A24EE5A4EC1C2735DA5DBCD25137780B_terseLabel_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_A24EE5A4EC1C2735DA5DBCD25137780B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Change in:</link:label>
    <link:label id="lab_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_A24EE5A4EC1C2735DA5DBCD25137780B_label_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_A24EE5A4EC1C2735DA5DBCD25137780B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Increase (Decrease) in Operating Capital [Abstract]</link:label>
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    <link:label id="lab_us-gaap_IncreaseDecreaseInReceivables_D8FF943207EB5EE91423BCD2513756D7_terseLabel_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInReceivables_D8FF943207EB5EE91423BCD2513756D7" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Accounts receivable</link:label>
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_IncreaseDecreaseInReceivables" xlink:label="loc_us-gaap_IncreaseDecreaseInReceivables_D8FF943207EB5EE91423BCD2513756D7" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncreaseDecreaseInReceivables_D8FF943207EB5EE91423BCD2513756D7" xlink:to="lab_us-gaap_IncreaseDecreaseInReceivables_D8FF943207EB5EE91423BCD2513756D7" xlink:type="arc" />
    <link:label id="lab_us-gaap_IncreaseDecreaseInInventories_27D6F4B669E7DFEF5A60BCD25137878B_terseLabel_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInInventories_27D6F4B669E7DFEF5A60BCD25137878B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Inventories and contracts in progress</link:label>
    <link:label id="lab_us-gaap_IncreaseDecreaseInInventories_27D6F4B669E7DFEF5A60BCD25137878B_label_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInInventories_27D6F4B669E7DFEF5A60BCD25137878B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Increase (Decrease) in Inventories</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_IncreaseDecreaseInInventories" xlink:label="loc_us-gaap_IncreaseDecreaseInInventories_27D6F4B669E7DFEF5A60BCD25137878B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncreaseDecreaseInInventories_27D6F4B669E7DFEF5A60BCD25137878B" xlink:to="lab_us-gaap_IncreaseDecreaseInInventories_27D6F4B669E7DFEF5A60BCD25137878B" xlink:type="arc" />
    <link:label id="lab_us-gaap_IncreaseDecreaseInOtherOperatingAssets_9915AC23FD7B1D917F20BCD25137D105_terseLabel_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInOtherOperatingAssets_9915AC23FD7B1D917F20BCD25137D105" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Other current assets</link:label>
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    <link:label id="lab_us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities_D2626DEA80A0BD29707FBCD251378E07_terseLabel_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities_D2626DEA80A0BD29707FBCD251378E07" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Accounts payable and accrued liabilities</link:label>
    <link:label id="lab_us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities_D2626DEA80A0BD29707FBCD251378E07_label_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities_D2626DEA80A0BD29707FBCD251378E07" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Increase (Decrease) in Accounts Payable and Accrued Liabilities</link:label>
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    <link:label id="lab_us-gaap_PensionContributions_5A75EA86D3890944FF87BCD2513718F3_terseLabel_en-US" xlink:label="lab_us-gaap_PensionContributions_5A75EA86D3890944FF87BCD2513718F3" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Global pension contributions</link:label>
    <link:label id="lab_us-gaap_PensionContributions_5A75EA86D3890944FF87BCD2513718F3_label_en-US" xlink:label="lab_us-gaap_PensionContributions_5A75EA86D3890944FF87BCD2513718F3" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Pension Contributions</link:label>
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    <link:label id="lab_us-gaap_OtherNoncashIncomeExpense_CE63BF6B6A4CEF140C20BCD25137F0EB_terseLabel_en-US" xlink:label="lab_us-gaap_OtherNoncashIncomeExpense_CE63BF6B6A4CEF140C20BCD25137F0EB" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Other operating activities, net</link:label>
    <link:label id="lab_us-gaap_OtherNoncashIncomeExpense_CE63BF6B6A4CEF140C20BCD25137F0EB_label_en-US" xlink:label="lab_us-gaap_OtherNoncashIncomeExpense_CE63BF6B6A4CEF140C20BCD25137F0EB" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other Noncash Income (Expense)</link:label>
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    <link:label id="lab_us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations_42B08EA4FF116FB96826BCD2513741AA_totalLabel_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations_42B08EA4FF116FB96826BCD2513741AA" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Net cash flows provided by operating activities</link:label>
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    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations_42B08EA4FF116FB96826BCD2513741AA" xlink:to="lab_us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations_42B08EA4FF116FB96826BCD2513741AA" xlink:type="arc" />
    <link:label id="lab_us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperationsAbstract_E0E7017DF4C149ED57B2BCD25137A8CC_terseLabel_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperationsAbstract_E0E7017DF4C149ED57B2BCD25137A8CC" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Investing Activities:</link:label>
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    <link:label id="lab_us-gaap_PaymentsToAcquireProductiveAssets_48BED8DC32B1B9DFC57EBCD251370718_terseLabel_en-US" xlink:label="lab_us-gaap_PaymentsToAcquireProductiveAssets_48BED8DC32B1B9DFC57EBCD251370718" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Capital expenditures</link:label>
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_PaymentsToAcquireProductiveAssets" xlink:label="loc_us-gaap_PaymentsToAcquireProductiveAssets_48BED8DC32B1B9DFC57EBCD251370718" xlink:type="locator" />
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    <link:label id="lab_utx_Notes3100Due2022Member_5CD8F3853A95970253EABC7DCBA49F6E_documentation_en-US" xlink:label="lab_utx_Notes3100Due2022Member_5CD8F3853A95970253EABC7DCBA49F6E" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Debt security issued by a domestic corporate business entity with a promise of repayment.</link:label>
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    <link:label id="lab_us-gaap_DebtInstrumentCarryingAmount_1F77D91C25268E579F24BC7DCBA65ADB_label_en-US" xlink:label="lab_us-gaap_DebtInstrumentCarryingAmount_1F77D91C25268E579F24BC7DCBA65ADB" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Long-term Debt, Gross</link:label>
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    <link:label id="lab_us-gaap_DebtInstrumentInterestRateTerms_87336F8ECB5B4C447E5ABC7DCBA6B6B4_terseLabel_en-US" xlink:label="lab_us-gaap_DebtInstrumentInterestRateTerms_87336F8ECB5B4C447E5ABC7DCBA6B6B4" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Debt Instrument, Interest Rate Terms</link:label>
    <link:label id="lab_us-gaap_DebtInstrumentInterestRateTerms_87336F8ECB5B4C447E5ABC7DCBA6B6B4_label_en-US" xlink:label="lab_us-gaap_DebtInstrumentInterestRateTerms_87336F8ECB5B4C447E5ABC7DCBA6B6B4" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Instrument, Interest Rate Terms</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_DebtInstrumentInterestRateTerms" xlink:label="loc_us-gaap_DebtInstrumentInterestRateTerms_87336F8ECB5B4C447E5ABC7DCBA6B6B4" xlink:type="locator" />
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    <link:label id="lab_us-gaap_OtherLoansPayable_F7E24999233AFC704218BC7DCBA69DA8_terseLabel_en-US" xlink:label="lab_us-gaap_OtherLoansPayable_F7E24999233AFC704218BC7DCBA69DA8" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Project financing obligations</link:label>
    <link:label id="lab_us-gaap_OtherLoansPayable_F7E24999233AFC704218BC7DCBA69DA8_label_en-US" xlink:label="lab_us-gaap_OtherLoansPayable_F7E24999233AFC704218BC7DCBA69DA8" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other Loans Payable</link:label>
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    <link:label id="lab_us-gaap_OtherLongTermDebt_61A071C31B1782D9CEECBC7DCBA64559_terseLabel_en-US" xlink:label="lab_us-gaap_OtherLongTermDebt_61A071C31B1782D9CEECBC7DCBA64559" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Other (including capitalized leases)</link:label>
    <link:label id="lab_us-gaap_OtherLongTermDebt_61A071C31B1782D9CEECBC7DCBA64559_label_en-US" xlink:label="lab_us-gaap_OtherLongTermDebt_61A071C31B1782D9CEECBC7DCBA64559" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other Long-term Debt</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_OtherLongTermDebt" xlink:label="loc_us-gaap_OtherLongTermDebt_61A071C31B1782D9CEECBC7DCBA64559" xlink:type="locator" />
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    <link:label id="lab_utx_PrincipalLongTermDebt_5521B4FC83FBA8421376BC7DCBA60F02_terseLabel_en-US" xlink:label="lab_utx_PrincipalLongTermDebt_5521B4FC83FBA8421376BC7DCBA60F02" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Total principal long-term debt</link:label>
    <link:label id="lab_utx_PrincipalLongTermDebt_5521B4FC83FBA8421376BC7DCBA60F02_label_en-US" xlink:label="lab_utx_PrincipalLongTermDebt_5521B4FC83FBA8421376BC7DCBA60F02" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Principal Long-Term Debt</link:label>
    <link:label id="lab_utx_PrincipalLongTermDebt_5521B4FC83FBA8421376BC7DCBA60F02_documentation_en-US" xlink:label="lab_utx_PrincipalLongTermDebt_5521B4FC83FBA8421376BC7DCBA60F02" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Including both current and noncurrent portions, carrying amount as of the balance-sheet date principal debt not elsewhere specified in the taxonomy with initial maturities beyond one year or beyond the normal operating cycle, if longer.</link:label>
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    <link:label id="lab_utx_OtherLongTermDebtFairMarketValueAdjustments_CD3A95B50DD2E525DB94BC7DCBA604B1_terseLabel_en-US" xlink:label="lab_utx_OtherLongTermDebtFairMarketValueAdjustments_CD3A95B50DD2E525DB94BC7DCBA604B1" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Other (fair market value adjustments and discounts)</link:label>
    <link:label id="lab_utx_OtherLongTermDebtFairMarketValueAdjustments_CD3A95B50DD2E525DB94BC7DCBA604B1_label_en-US" xlink:label="lab_utx_OtherLongTermDebtFairMarketValueAdjustments_CD3A95B50DD2E525DB94BC7DCBA604B1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other Long-Term Debt Fair Market Value Adjustments</link:label>
    <link:label id="lab_utx_OtherLongTermDebtFairMarketValueAdjustments_CD3A95B50DD2E525DB94BC7DCBA604B1_documentation_en-US" xlink:label="lab_utx_OtherLongTermDebtFairMarketValueAdjustments_CD3A95B50DD2E525DB94BC7DCBA604B1" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Including both current and noncurrent portions, fair market value adjustments of debt not elsewhere specified in the taxonomy with initial maturities beyond one year or beyond the normal operating cycle, if longer.</link:label>
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    <link:label id="lab_us-gaap_LongTermDebtAndCapitalLeaseObligationsIncludingCurrentMaturities_6E95BDBCE964C3536BB9BC8F0DB9FCF7_totalLabel_en-US" xlink:label="lab_us-gaap_LongTermDebtAndCapitalLeaseObligationsIncludingCurrentMaturities_6E95BDBCE964C3536BB9BC8F0DB9FCF7" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Total Long-Term Debt</link:label>
    <link:label id="lab_us-gaap_LongTermDebtAndCapitalLeaseObligationsIncludingCurrentMaturities_6E95BDBCE964C3536BB9BC8F0DB9FCF7_label_en-US" xlink:label="lab_us-gaap_LongTermDebtAndCapitalLeaseObligationsIncludingCurrentMaturities_6E95BDBCE964C3536BB9BC8F0DB9FCF7" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Long-term Debt and Capital Lease Obligations, Including Current Maturities</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_LongTermDebtAndCapitalLeaseObligationsIncludingCurrentMaturities" xlink:label="loc_us-gaap_LongTermDebtAndCapitalLeaseObligationsIncludingCurrentMaturities_6E95BDBCE964C3536BB9BC8F0DB9FCF7" xlink:type="locator" />
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    <link:label id="lab_us-gaap_LongTermDebtAndCapitalLeaseObligationsCurrent_60C8F691BD97757B38ECBC7DCBA7A20B_verboseLabel_en-US" xlink:label="lab_us-gaap_LongTermDebtAndCapitalLeaseObligationsCurrent_60C8F691BD97757B38ECBC7DCBA7A20B" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Less: current portion</link:label>
    <link:label id="lab_us-gaap_LongTermDebtAndCapitalLeaseObligationsCurrent_60C8F691BD97757B38ECBC7DCBA7A20B_label_en-US" xlink:label="lab_us-gaap_LongTermDebtAndCapitalLeaseObligationsCurrent_60C8F691BD97757B38ECBC7DCBA7A20B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Long-term Debt and Capital Lease Obligations, Current</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_LongTermDebtAndCapitalLeaseObligationsCurrent" xlink:label="loc_us-gaap_LongTermDebtAndCapitalLeaseObligationsCurrent_60C8F691BD97757B38ECBC7DCBA7A20B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LongTermDebtAndCapitalLeaseObligationsCurrent_60C8F691BD97757B38ECBC7DCBA7A20B" xlink:to="lab_us-gaap_LongTermDebtAndCapitalLeaseObligationsCurrent_60C8F691BD97757B38ECBC7DCBA7A20B" xlink:type="arc" />
    <link:label id="lab_us-gaap_LongTermDebtAndCapitalLeaseObligations_922C82DA533C6EC6DEEBBC7DCBA7263D_verboseLabel_en-US" xlink:label="lab_us-gaap_LongTermDebtAndCapitalLeaseObligations_922C82DA533C6EC6DEEBBC7DCBA7263D" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Long-term debt, net of current portion</link:label>
    <link:label id="lab_us-gaap_LongTermDebtAndCapitalLeaseObligations_922C82DA533C6EC6DEEBBC7DCBA7263D_label_en-US" xlink:label="lab_us-gaap_LongTermDebtAndCapitalLeaseObligations_922C82DA533C6EC6DEEBBC7DCBA7263D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Long-term Debt and Capital Lease Obligations</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_LongTermDebtAndCapitalLeaseObligations" xlink:label="loc_us-gaap_LongTermDebtAndCapitalLeaseObligations_922C82DA533C6EC6DEEBBC7DCBA7263D" xlink:type="locator" />
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear_4788F501F098D095D9CE4EEBC3FB88BC" xlink:type="locator" />
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    <link:label id="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths_1F185AB264181DD917584EEBC3FB74E9_label_en-US" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths_1F185AB264181DD917584EEBC3FB74E9" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths_1F185AB264181DD917584EEBC3FB74E9" xlink:type="locator" />
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    <link:label id="lab_utx_RestructuringAndRelatedCostsActionsByYearAxis_0689B2AE0C39FED0E9534EEBC3FB9733_terseLabel_en-US" xlink:label="lab_utx_RestructuringAndRelatedCostsActionsByYearAxis_0689B2AE0C39FED0E9534EEBC3FB9733" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Restructuring And Related Costs Actions By Year [Axis]</link:label>
    <link:label id="lab_utx_RestructuringAndRelatedCostsActionsByYearAxis_0689B2AE0C39FED0E9534EEBC3FB9733_label_en-US" xlink:label="lab_utx_RestructuringAndRelatedCostsActionsByYearAxis_0689B2AE0C39FED0E9534EEBC3FB9733" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Restructuring And Related Costs Actions By Year [Axis]</link:label>
    <link:label id="lab_utx_RestructuringAndRelatedCostsActionsByYearAxis_0689B2AE0C39FED0E9534EEBC3FB9733_documentation_en-US" xlink:label="lab_utx_RestructuringAndRelatedCostsActionsByYearAxis_0689B2AE0C39FED0E9534EEBC3FB9733" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">The time period of restructuring and related costs that are included in an entity's restructuring reserve abd restructuring reserve period expense</link:label>
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    <link:label id="lab_utx_RestructuringAndRelatedCostsActionsByYearDomain_30975204F95530BD56544EEBC3FBCCF2_terseLabel_en-US" xlink:label="lab_utx_RestructuringAndRelatedCostsActionsByYearDomain_30975204F95530BD56544EEBC3FBCCF2" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Restructuring And Related Costs Actions By Year [Domain]</link:label>
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    <link:label id="lab_utx_RestructuringAndRelatedCostsActionsByYearDomain_30975204F95530BD56544EEBC3FBCCF2_documentation_en-US" xlink:label="lab_utx_RestructuringAndRelatedCostsActionsByYearDomain_30975204F95530BD56544EEBC3FBCCF2" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Identification of the time periods of restructuring and related activities</link:label>
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    <link:label id="lab_utx_CurrentYearActionsMember_45D0DD0CCF8121A060DD4EEBC3FB6572_terseLabel_en-US" xlink:label="lab_utx_CurrentYearActionsMember_45D0DD0CCF8121A060DD4EEBC3FB6572" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Current Year Actions [Member]</link:label>
    <link:label id="lab_utx_CurrentYearActionsMember_45D0DD0CCF8121A060DD4EEBC3FB6572_label_en-US" xlink:label="lab_utx_CurrentYearActionsMember_45D0DD0CCF8121A060DD4EEBC3FB6572" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Current Year Actions [Member]</link:label>
    <link:label id="lab_utx_CurrentYearActionsMember_45D0DD0CCF8121A060DD4EEBC3FB6572_documentation_en-US" xlink:label="lab_utx_CurrentYearActionsMember_45D0DD0CCF8121A060DD4EEBC3FB6572" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">The charge against earnings for current year actions.</link:label>
    <link:loc xlink:href="utx-20150630.xsd#utx_CurrentYearActionsMember" xlink:label="loc_utx_CurrentYearActionsMember_45D0DD0CCF8121A060DD4EEBC3FB6572" xlink:type="locator" />
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    <link:label id="lab_utx_PriorYearActionsMember_6D979D118B658C623F2A4EEBC3FBED18_label_en-US" xlink:label="lab_utx_PriorYearActionsMember_6D979D118B658C623F2A4EEBC3FBED18" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Prior Year Actions [Member]</link:label>
    <link:label id="lab_utx_PriorYearActionsMember_6D979D118B658C623F2A4EEBC3FBED18_documentation_en-US" xlink:label="lab_utx_PriorYearActionsMember_6D979D118B658C623F2A4EEBC3FBED18" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">The charge against earnings for prior year actions.</link:label>
    <link:loc xlink:href="utx-20150630.xsd#utx_PriorYearActionsMember" xlink:label="loc_utx_PriorYearActionsMember_6D979D118B658C623F2A4EEBC3FBED18" xlink:type="locator" />
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    <link:label id="lab_us-gaap_EmployeeSeveranceMember_40E5593888F32AABA0114EEBC3FB641E_terseLabel_en-US" xlink:label="lab_us-gaap_EmployeeSeveranceMember_40E5593888F32AABA0114EEBC3FB641E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Severance [Member]</link:label>
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    <link:label id="lab_utx_LongTermTradeAccountsReceivableFinancingReceivableMember_40E2B45AD28E148497DD4EEBC3CCD798_terseLabel_en-US" xlink:label="lab_utx_LongTermTradeAccountsReceivableFinancingReceivableMember_40E2B45AD28E148497DD4EEBC3CCD798" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Long-term trade accounts receivable [Member]</link:label>
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    <link:label id="lab_utx_LossContingencyInterestPaid_6B6C048C7E9A612426AABCD2B1F69526_documentation_en-US" xlink:label="lab_utx_LossContingencyInterestPaid_6B6C048C7E9A612426AABCD2B1F69526" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Interest paid to third party related to loss contingency</link:label>
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    <link:label id="lab_utx_LossContingencyFutureExpectedInterestPayments_261E3C1BF03E326BA7DEBCD2B1F67950_terseLabel_en-US" xlink:label="lab_utx_LossContingencyFutureExpectedInterestPayments_261E3C1BF03E326BA7DEBCD2B1F67950" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Loss Contingency, Future Expected Interest Payments</link:label>
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    <link:label id="lab_utx_LossContingencyFutureExpectedInterestPayments_261E3C1BF03E326BA7DEBCD2B1F67950_documentation_en-US" xlink:label="lab_utx_LossContingencyFutureExpectedInterestPayments_261E3C1BF03E326BA7DEBCD2B1F67950" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Amount of interest payments expected to be made in relation to loss contingency.</link:label>
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    <link:label id="lab_utx_VariableInterestEntityConsolidatedCarryingAmountCurrentAssets_F5BB92A522755073B69B4EEBC487F6D8_terseLabel_en-US" xlink:label="lab_utx_VariableInterestEntityConsolidatedCarryingAmountCurrentAssets_F5BB92A522755073B69B4EEBC487F6D8" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Current Assets</link:label>
    <link:label id="lab_utx_VariableInterestEntityConsolidatedCarryingAmountCurrentAssets_F5BB92A522755073B69B4EEBC487F6D8_label_en-US" xlink:label="lab_utx_VariableInterestEntityConsolidatedCarryingAmountCurrentAssets_F5BB92A522755073B69B4EEBC487F6D8" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Variable Interest Entity, Consolidated, Carrying Amount, Current Assets</link:label>
    <link:label id="lab_utx_VariableInterestEntityConsolidatedCarryingAmountCurrentAssets_F5BB92A522755073B69B4EEBC487F6D8_documentation_en-US" xlink:label="lab_utx_VariableInterestEntityConsolidatedCarryingAmountCurrentAssets_F5BB92A522755073B69B4EEBC487F6D8" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">The carrying amount of the consolidated Variable Interest Entity's current assets included in the reporting entity's statement of financial position.</link:label>
    <link:loc xlink:href="utx-20150630.xsd#utx_VariableInterestEntityConsolidatedCarryingAmountCurrentAssets" xlink:label="loc_utx_VariableInterestEntityConsolidatedCarryingAmountCurrentAssets_F5BB92A522755073B69B4EEBC487F6D8" xlink:type="locator" />
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    <link:label id="lab_utx_VariableInterestEntityConsolidatedCarryingAmountNoncurrentAssets_E942373203882B68DD584EEBC487CC5C_documentation_en-US" xlink:label="lab_utx_VariableInterestEntityConsolidatedCarryingAmountNoncurrentAssets_E942373203882B68DD584EEBC487CC5C" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">The carrying amount of the consolidated Variable Interest Entity's noncurrent assets included in the reporting entity's statement of financial position.</link:label>
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    <link:label id="lab_us-gaap_VariableInterestEntityConsolidatedCarryingAmountAssets_98B22ECA7A99DCFA75474EEBC4879019_totalLabel_en-US" xlink:label="lab_us-gaap_VariableInterestEntityConsolidatedCarryingAmountAssets_98B22ECA7A99DCFA75474EEBC4879019" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Total Assets</link:label>
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    <link:label id="lab_utx_VariableInterestEntityConsolidatedCarryingAmountCurrentLiabilities_5E5C9D8CF19DFBC4CA324EEBC487FF2D_documentation_en-US" xlink:label="lab_utx_VariableInterestEntityConsolidatedCarryingAmountCurrentLiabilities_5E5C9D8CF19DFBC4CA324EEBC487FF2D" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">The carrying amount of the consolidated Variable Interest Entity's current liabilities included in the reporting entity's statement of financial position.</link:label>
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    <link:label id="lab_utx_VariableInterestEntityConsolidatedCarryingAmountNoncurrentLiabilities_F6D911BA415FD1E431B54EEBC4871967_documentation_en-US" xlink:label="lab_utx_VariableInterestEntityConsolidatedCarryingAmountNoncurrentLiabilities_F6D911BA415FD1E431B54EEBC4871967" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">The carrying amount of the consolidated Variable Interest Entity's noncurrent liabilities included in the reporting entity's statement of financial position.</link:label>
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    <link:label id="lab_utx_ShortTermBorrowingsFairValueDisclosure_B6D21A6616EEDDFEEFBDBCD2B2352328_terseLabel_en-US" xlink:label="lab_utx_ShortTermBorrowingsFairValueDisclosure_B6D21A6616EEDDFEEFBDBCD2B2352328" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Short Term borrowings</link:label>
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    <link:label id="lab_utx_OtherLongTermLiabilitiesFairValueDisclosure_349BCE4208245E64A2B8BCD2B2353B48_terseLabel_en-US" xlink:label="lab_utx_OtherLongTermLiabilitiesFairValueDisclosure_349BCE4208245E64A2B8BCD2B2353B48" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Long-term liabilities</link:label>
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    <link:label id="lab_us-gaap_StatementOfFinancialPositionAbstract_ED04B55CEF2AC9C5261EB7D5C558BC05_label_en-US" xlink:label="lab_us-gaap_StatementOfFinancialPositionAbstract_ED04B55CEF2AC9C5261EB7D5C558BC05" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Statement of Financial Position [Abstract]</link:label>
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    <link:label id="lab_us-gaap_AssetsAbstract_16CA0DBF4D741FFA74AFB7D5C5596FAF_terseLabel_en-US" xlink:label="lab_us-gaap_AssetsAbstract_16CA0DBF4D741FFA74AFB7D5C5596FAF" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Assets</link:label>
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