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  <xsd:element abstract="true" id="intt_AmbrellMember" name="AmbrellMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="intt_AssetMember" name="AssetMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/>
  <xsd:element id="intt_BasisOfPresentationAndUseOfEstimatesPolicyTextBlock" name="BasisOfPresentationAndUseOfEstimatesPolicyTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration"/>
  <xsd:element id="intt_BusinessCombinationAmountRemovedFromEBITDACalculation" name="BusinessCombinationAmountRemovedFromEBITDACalculation" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration"/>
  <xsd:element id="intt_BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiabilityAndEarnoutPayable" name="BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiabilityAndEarnoutPayable" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration"/>
  <xsd:element id="intt_BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfEarnoutPayable" name="BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfEarnoutPayable" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration"/>
  <xsd:element id="intt_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesAccruedExpenses" name="BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesAccruedExpenses" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant"/>
  <xsd:element id="intt_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesCustomerAdvances" name="BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesCustomerAdvances" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant"/>
  <xsd:element abstract="true" id="intt_ContingentConsiderationLiabilityMember" name="ContingentConsiderationLiabilityMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="intt_CurrentAbstract" name="CurrentAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element id="intt_CurrentLiabilitiesTableTextBlock" name="CurrentLiabilitiesTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element id="intt_CustomerAdvancesAndDepositsAndDeferredRevenueCurrent" name="CustomerAdvancesAndDepositsAndDeferredRevenueCurrent" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant"/>
  <xsd:element abstract="true" id="intt_DeferredAbstract" name="DeferredAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element id="intt_DeferredTaxAssetsAcquisitionCosts" name="DeferredTaxAssetsAcquisitionCosts" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant"/>
  <xsd:element id="intt_DefinedContributionPlanEmployerMatchingContributionVestingPeriod" name="DefinedContributionPlanEmployerMatchingContributionVestingPeriod" nillable="true" substitutionGroup="xbrli:item" type="xbrli:durationItemType" xbrli:periodType="duration"/>
  <xsd:element id="intt_DefinedContributionPlanMaximumAnnualEmployerMatchingContributionPerEmplyeeAmount" name="DefinedContributionPlanMaximumAnnualEmployerMatchingContributionPerEmplyeeAmount" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="intt_DocumentAndEntityInformation" name="DocumentAndEntityInformation" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="intt_EMSMember" name="EMSMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/>
  <xsd:element id="intt_EquipmentLeasedToCustomersInitialTerm" name="EquipmentLeasedToCustomersInitialTerm" nillable="true" substitutionGroup="xbrli:item" type="xbrli:durationItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="intt_ForeignMember" name="ForeignMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/>
  <xsd:element id="intt_GoodwillIntangibleAndLongLivedAssetsPolicyTextBlock" name="GoodwillIntangibleAndLongLivedAssetsPolicyTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="intt_HakutoCoLtdMember" name="HakutoCoLtdMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/>
  <xsd:element id="intt_IncomeTaxRateReconciliationAcquisitionCosts" name="IncomeTaxRateReconciliationAcquisitionCosts" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration"/>
  <xsd:element id="intt_IncomeTaxRateReconciliationFederalTransitionTaxPayableAmount" name="IncomeTaxRateReconciliationFederalTransitionTaxPayableAmount" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration"/>
  <xsd:element id="intt_IncomeTaxReconciliationDeemedDividendFromForeignSubsidiaries" name="IncomeTaxReconciliationDeemedDividendFromForeignSubsidiaries" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration"/>
  <xsd:element id="intt_IncomeTaxReconciliationDomesticProductionActivitiesDeduction" name="IncomeTaxReconciliationDomesticProductionActivitiesDeduction" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration"/>
  <xsd:element id="intt_IncomeTaxReconciliationEffectsOfNetOperatingLossAndTaxCreditCarryforwards" name="IncomeTaxReconciliationEffectsOfNetOperatingLossAndTaxCreditCarryforwards" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration"/>
  <xsd:element id="intt_IncreaseDecreaseInFederalTransitionTaxPayable" name="IncreaseDecreaseInFederalTransitionTaxPayable" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="intt_ManagementBonusMember" name="ManagementBonusMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="intt_MansfieldMember" name="MansfieldMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="intt_MtLaurelMember" name="MtLaurelMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="intt_NoteToFinancialStatementDetailsTextual" name="NoteToFinancialStatementDetailsTextual" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="intt_NotesToFinancialStatements" name="NotesToFinancialStatements" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="intt_NotesToFinancialStatementsAbstract" name="NotesToFinancialStatementsAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element id="intt_ProceedsFromSaleOfMachineryAndEquipmentNetOfGain" name="ProceedsFromSaleOfMachineryAndEquipmentNetOfGain" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration"/>
  <xsd:element id="intt_ScheduleOfCarryingValueOfFinitelivedIntangibleAssetsTableTextBlock" name="ScheduleOfCarryingValueOfFinitelivedIntangibleAssetsTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration"/>
  <xsd:element id="intt_ScheduleOfIntangibleAssetsTableTextBlock" name="ScheduleOfIntangibleAssetsTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element id="intt_ScheduleOfOutstandingLettersOfCreditTableTextBlock" name="ScheduleOfOutstandingLettersOfCreditTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="intt_SigmaMember" name="SigmaMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="intt_StockPlan2007Member" name="StockPlan2007Member" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="intt_StockPlan2014Member" name="StockPlan2014Member" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/>
  <xsd:element id="intt_StockRepurchasePlanTextBlock" name="StockRepurchasePlanTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="intt_TexasInstrumentsIncorporatedMember" name="TexasInstrumentsIncorporatedMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="intt_TheAmbrellPlanMember" name="TheAmbrellPlanMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="intt_ThermalProductsAndMechanicalProductsMember" name="ThermalProductsAndMechanicalProductsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="intt_ThermalProductsMember" name="ThermalProductsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="intt_ThermonicsMember" name="ThermonicsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/>
  <xsd:element id="intt_TransitionTaxRateOnUndistributedForeignEarnings" name="TransitionTaxRateOnUndistributedForeignEarnings" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="duration"/>
  <xsd:element id="intt_ValuationAllowancesAndReservesTableTextBlock" name="ValuationAllowancesAndReservesTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="intt_statement-statement-note-10-commitments-and-contingencies-minimum-rental-commitments-under-noncancellable-operating-leases-details" name="statement-statement-note-10-commitments-and-contingencies-minimum-rental-commitments-under-noncancellable-operating-leases-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="intt_statement-statement-note-10-commitments-and-contingencies-tables" name="statement-statement-note-10-commitments-and-contingencies-tables" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="intt_statement-statement-note-11-income-taxes-deferred-tax-assets-and-liabilities-details" name="statement-statement-note-11-income-taxes-deferred-tax-assets-and-liabilities-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="intt_statement-statement-note-11-income-taxes-earnings-before-income-taxes-details" name="statement-statement-note-11-income-taxes-earnings-before-income-taxes-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="intt_statement-statement-note-11-income-taxes-effective-tax-rate-analysis-and-reconciliation-of-expected-statutory-rate-details" name="statement-statement-note-11-income-taxes-effective-tax-rate-analysis-and-reconciliation-of-expected-statutory-rate-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="intt_statement-statement-note-11-income-taxes-income-tax-expense-benefit-details" name="statement-statement-note-11-income-taxes-income-tax-expense-benefit-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="intt_statement-statement-note-11-income-taxes-tables" name="statement-statement-note-11-income-taxes-tables" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="intt_statement-statement-note-13-stockbased-compensation-plan-allocation-of-sharebased-compensation-expense-details" name="statement-statement-note-13-stockbased-compensation-plan-allocation-of-sharebased-compensation-expense-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="intt_statement-statement-note-13-stockbased-compensation-plan-nonvested-shares-details" name="statement-statement-note-13-stockbased-compensation-plan-nonvested-shares-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="intt_statement-statement-note-13-stockbased-compensation-plan-stock-option-activity-details" name="statement-statement-note-13-stockbased-compensation-plan-stock-option-activity-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="intt_statement-statement-note-13-stockbased-compensation-plan-stock-option-activity-details-parentheticals" name="statement-statement-note-13-stockbased-compensation-plan-stock-option-activity-details-parentheticals" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="intt_statement-statement-note-13-stockbased-compensation-plan-stock-options-valuation-assumptions-details" name="statement-statement-note-13-stockbased-compensation-plan-stock-options-valuation-assumptions-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="intt_statement-statement-note-13-stockbased-compensation-plan-tables" name="statement-statement-note-13-stockbased-compensation-plan-tables" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="intt_statement-statement-note-16-segment-information-identifiable-assets-details" name="statement-statement-note-16-segment-information-identifiable-assets-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="intt_statement-statement-note-16-segment-information-longlived-assets-by-geographical-area-details" name="statement-statement-note-16-segment-information-longlived-assets-by-geographical-area-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="intt_statement-statement-note-16-segment-information-net-revenue-from-unaffiliated-customers-details" name="statement-statement-note-16-segment-information-net-revenue-from-unaffiliated-customers-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="intt_statement-statement-note-16-segment-information-segment-information-details" name="statement-statement-note-16-segment-information-segment-information-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="intt_statement-statement-note-16-segment-information-tables" name="statement-statement-note-16-segment-information-tables" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="intt_statement-statement-note-17-quarterly-consolidated-financial-data-quarterly-consolidated-financial-data-details" name="statement-statement-note-17-quarterly-consolidated-financial-data-quarterly-consolidated-financial-data-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="intt_statement-statement-note-17-quarterly-consolidated-financial-data-unaudited-tables" name="statement-statement-note-17-quarterly-consolidated-financial-data-unaudited-tables" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="intt_statement-statement-note-2-summary-of-significant-accounting-policies-tables" name="statement-statement-note-2-summary-of-significant-accounting-policies-tables" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="intt_statement-statement-note-2-summary-of-significant-accounting-policies-weighted-average-common-shares-details" name="statement-statement-note-2-summary-of-significant-accounting-policies-weighted-average-common-shares-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="intt_statement-statement-note-3-acquisition-intangible-assets-acquired-details" name="statement-statement-note-3-acquisition-intangible-assets-acquired-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="intt_statement-statement-note-3-acquisition-proforma-information-details" name="statement-statement-note-3-acquisition-proforma-information-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="intt_statement-statement-note-3-acquisition-purchase-price-details" name="statement-statement-note-3-acquisition-purchase-price-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="intt_statement-statement-note-3-acquisition-tables" name="statement-statement-note-3-acquisition-tables" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="intt_statement-statement-note-4-fair-value-measurements-change-in-fair-value-of-contingent-consideration-liability-details" name="statement-statement-note-4-fair-value-measurements-change-in-fair-value-of-contingent-consideration-liability-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="intt_statement-statement-note-4-fair-value-measurements-liabilities-measured-on-a-recurring-basis-details" name="statement-statement-note-4-fair-value-measurements-liabilities-measured-on-a-recurring-basis-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="intt_statement-statement-note-4-fair-value-measurements-tables" name="statement-statement-note-4-fair-value-measurements-tables" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="intt_statement-statement-note-5-goodwill-and-intangible-assets-changes-in-the-amount-of-the-carrying-value-of-goodwill-details" name="statement-statement-note-5-goodwill-and-intangible-assets-changes-in-the-amount-of-the-carrying-value-of-goodwill-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="intt_statement-statement-note-5-goodwill-and-intangible-assets-changes-in-the-amount-of-the-carrying-value-of-intangible-assets-details" name="statement-statement-note-5-goodwill-and-intangible-assets-changes-in-the-amount-of-the-carrying-value-of-intangible-assets-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="intt_statement-statement-note-5-goodwill-and-intangible-assets-future-amortization-expense-details" name="statement-statement-note-5-goodwill-and-intangible-assets-future-amortization-expense-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="intt_statement-statement-note-5-goodwill-and-intangible-assets-intangible-assets-details" name="statement-statement-note-5-goodwill-and-intangible-assets-intangible-assets-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="intt_statement-statement-note-5-goodwill-and-intangible-assets-tables" name="statement-statement-note-5-goodwill-and-intangible-assets-tables" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="intt_statement-statement-note-7-inventories-inventories-held-details" name="statement-statement-note-7-inventories-inventories-held-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="intt_statement-statement-note-7-inventories-tables" name="statement-statement-note-7-inventories-tables" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="intt_statement-statement-note-8-other-current-liabilities-other-current-liabilities-details" name="statement-statement-note-8-other-current-liabilities-other-current-liabilities-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="intt_statement-statement-note-8-other-current-liabilities-tables" name="statement-statement-note-8-other-current-liabilities-tables" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="intt_statement-statement-note-9-debt-outstanding-letters-of-credit-details" name="statement-statement-note-9-debt-outstanding-letters-of-credit-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="intt_statement-statement-note-9-debt-tables" name="statement-statement-note-9-debt-tables" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="intt_statement-statement-schedule-ii-valuation-and-qualifying-accounts-tables" name="statement-statement-schedule-ii-valuation-and-qualifying-accounts-tables" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="intt_statement-statement-schedule-ii-valuation-and-qualifying-accounts-valuation-and-qualifying-accounts-details" name="statement-statement-schedule-ii-valuation-and-qualifying-accounts-valuation-and-qualifying-accounts-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="intt_statement-statement-significant-accounting-policies-policies" name="statement-statement-significant-accounting-policies-policies" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
</xsd:schema>
