DIN 41494 Bb.1-1992 电子设备机械结构.482,6mm系列的机械结构件.应用导则
作者:标准资料网 时间:2024-05-15 21:02:23 浏览:9920
来源:标准资料网
【英文标准名称】:Mechanicalstructuresforelectronicequipments;mechanicalstructuresofthe482,6mmseries;guidefortheapplication
【原文标准名称】:电子设备机械结构.482,6mm系列的机械结构件.应用导则
【标准号】:DIN41494Bb.1-1992
【标准状态】:现行
【国别】:德国
【发布日期】:1992-12
【实施或试行日期】:
【发布单位】:德国标准化学会(DIN)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:482mm系列;尺寸;材料(按性能和用途分);注册;指导手册;电子工程;设备;调查;19英寸系列;电子设备及元件;电子的;结构;结构体系;元部件
【英文主题词】:materialsbypropertyandpurpose;electronicengineering;components;electronicequipmentandcomponents;structures;dimensions;19inchseries;electronic;guidebooks;structuralsystems;registers;482;equ
【摘要】:
【中国标准分类号】:L94
【国际标准分类号】:1400
【页数】:12P;A4
【正文语种】:德语
【英文标准名称】:Textiles.Testsforcolourfastness.Generalprinciplesoftesting
【原文标准名称】:纺织品.色牢度试验.第A01部分:试验的一般原则
【标准号】:BSEN20105-A01-1993
【标准状态】:作废
【国别】:英国
【发布日期】:1993-01-15
【实施或试行日期】:
【发布单位】:英国标准学会(BSI)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:色牢度试验;定义;试验条件;试样制备;比较试验;颜色;沾污试验;纺织产品;织物试验;纺织材料;外观检查(试验);色牢度;纺织试验
【英文主题词】:
【摘要】:
【中国标准分类号】:W04;W70
【国际标准分类号】:
【页数】:16P;A4
【正文语种】:英语
【英文标准名称】:StandardTestMethodforBreakingStrengthandElongationofTextileFabrics(GrabTest)
【原文标准名称】:纺织品断裂强力及伸长率标准试验方法(抓样法)
【标准号】:ASTMD5034-2009
【标准状态】:现行
【国别】:美国
【发布日期】:2009
【实施或试行日期】:
【发布单位】:美国材料与试验协会(US-ASTM)
【起草单位】:D13.60
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:breaking-strength;elongation;fabric;nonwovenfabric;wovenfabric;Nonwoventextilefabrics;Tensileproperties/testing--textilematerials/applications;Textilefabrics(felted);Textilefabrics(general);Wettesting;Woventextilefabrics;Breaki
【摘要】:Thegrabtestprocedureinthistestmethodforthedeterminationofbreakingforceandelongationisconsideredsatisfactoryforacceptancetestingofcommercialshipmentsofmostwovenornonwoventextilefabrics,andthemodifiedgrabtestprocedureisconsideredsatisfactoryforacceptancetestingofcommercialshipmentsofmostwoventextilefabrics,sincetheprocedureshavebeenusedextensivelyinthetradeforacceptancetesting.Incaseofdisagreementarisingfromdifferencesinreportedtestvalueswhenusingthistestmethodforacceptancetestingofcommercialshipments,thepurchaserandthesuppliershouldconductcomparativeteststodetermineifthereisastatisticalbiasbetweentheirlaboratories.Competentstatisticalassistanceisrecommendedfortheinvestigationofbias.Asaminimum,thetwopartiesshouldtakeagroupoftestspecimenswhichareashomogeneousaspossibleandwhicharefromalotofmaterialofthetypeinquestion.Thetestspecimensshouldthenberandomlyassignedinequalnumberstoeachlaboratoryfortesting.TheaverageresultsfromthetwolaboratoriesshouldbecomparedusingStudent''st-testforunpaireddataandanacceptableprobabilitylevelchosenbythetwopartiesbeforetestingisbegun.Ifabiasisfound,eitheritscausemustbefoundandcorrected,orthepurchaserandthesuppliermustagreetointerpretfuturetestresultsinlightoftheknownbias.Thistestmethodisnotrecommendedforknittedfabricsbecauseoftheirhighstretch.Somemodificationoftechniquemaybenecessaryforanyfabrichavingastrengthinexcessof200-N/cm(1140-lb/in.)width.Specialprecautionarymeasuresareprovidedforusewhennecessaryforstrongfabrics.Alloftheproceduresareapplicablefortestingfabricseitherconditionedorwet.Comparisonofresultsfromtensiletestingmachinesoperatingondifferentprinciplesisnotrecommended.Whendifferenttypesofmachinesareusedforcomparisontesting,constant-time-to-breakat20x00B1;3sistheestablishedwayofproducingdata.Eventhenthedatamaydiffersignificantly.Althoughaconstant-rate-of-extensionispreferredintheseprocedures,incasesofdispute,unlessthereisagreementtothecontrarybetweenthepurchaserandthesupplier,aconstant-time-to-break(20x00B1;3s)istobeused.Thegrabtestprocedureisapplicabletothedeterminationoftheeffectivestrengthofthefabric;thatis,thestrengthoftheyarnsinaspecificwidthtogetherwiththefabricassistancefromtheadjacentyarns.Thebreakingforcedeterminedbythegrabprocedureisnotareflectionofthestrengthoftheyarnsactuallygrippedbetweenclampsandcannotbeusedfordirectcomparisonwithyarnstrengthdeterminations.Grabtestspecimensrequiremuchlesstimetopreparealthoughtheyrequiremorefabricperspecimen.Thereisnosimplerelationshipbetweengrabtestsandstriptestssincetheamountoffabricassistancedependsonthetypeoffabricandconstructionvariables.Themodifiedgrabtestprocedureisapplicabletothedeterminationofthebreakingforceoffabricswithconstructionsinwhichtheapplicationoftensilestressonraveledstripspecimensproducesfurtherunraveling.Thistestmethodisparticularlyapplicabletohigh-strengthfabrics.MetricEquivalentsin.
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