您的位置: 标准下载 » 国内标准 » 行业标准 »

QJ 2990.2-1997 弯管夹具通用零件 活动钢芯轴 活动钢芯轴筒

时间:2024-05-10 19:51:01 来源: 标准资料网 作者:标准资料网 阅读:9381
下载地址: 点击此处下载
基本信息
标准名称:弯管夹具通用零件 活动钢芯轴 活动钢芯轴筒
中标分类:
ICS分类: 机械制造 >> 机床装置 >> 分度和刀具/工件夹持装置
发布日期:1997-03-10
实施日期:1997-10-31
首发日期:
作废日期:
出版日期:
页数:5页
适用范围

没有内容

前言

没有内容

目录

没有内容

引用标准

没有内容

所属分类: 机械制造 机床装置 分度和刀具/工件夹持装置
【英文标准名称】:StandardTestMethodforpHofAtmosphericWetDepositionSamplesbyElectrometricDetermination
【原文标准名称】:电测法测定大气湿沉积物样品pH值的标准试验方法
【标准号】:ASTMD5015-2002
【标准状态】:现行
【国别】:
【发布日期】:2002
【实施或试行日期】:
【发布单位】:美国材料与试验协会(ASTM)
【起草单位】:D22.03
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:试验方法;沉积物;大气;pH值;湿的
【英文主题词】:atmosphericdeposition;hydrogenion;lowionicstrengthsolutions;pH;precipitation;wetdeposition;
【摘要】:TheaccuratemeasurementofpHinatmosphericwetdepositionisanessentialandcriticallyimportantcomponentinthemonitoringofatmosphericwetdepositionfortrendsintheacidityandoverallairquality.Atmosphericwetdepositionis,ingeneral,alowionicstrength,unbufferedsolution.Specialprecautions,asdetailedinthistestmethod,arenecessarytoensureaccuratepHmeasurements(1).3Specialemphasismustbeplacedonminimizingtheeffectoftheresidualliquidjunctionpotentialbias.ThistestmethodisapplicableonlytothemeasurementofpHinatmosphericwetdeposition.Itsuseinotherapplicationsmayresultininaccuracies.Fig.1providesafrequencydistributionofprecipitationpHvaluesmeasuredinconjunctionwithanationalmonitoringprogramwithintheUnitedStates.ThesedataareanindicationoftherangeofpHvaluescommontoatmosphericwetdeposition.FIG.1FrequencyDistributionofMeasuredLaboratorypHofAtmosphericWetDepositionFromthe1984NationalAtmosphericDepositionProgram(NADP)/NationalTrendsNetwork(NTN)1.1ThistestmethodisapplicabletothedeterminationofpHinatmosphericwetdepositionsamplesbyelectrometricmeasurementusingeitherapHhalfcellwithareferenceprobeoracombinationelectrodeasthesensor.1.2Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:Z15
【国际标准分类号】:71_040_50
【页数】:6P.;A4
【正文语种】:


【英文标准名称】:Codeofpracticefortheuseofprofiledsheetforroofandwallcladdingonbuildings-Design
【原文标准名称】:建筑物屋顶和镶面板用型板惯例.第1部分:设计
【标准号】:BS5427-1-1996
【标准状态】:现行
【国别】:英国
【发布日期】:1996-07-15
【实施或试行日期】:1996-07-15
【发布单位】:英国标准学会(BSI)
【起草单位】:BSI
【标准类型】:()
【标准水平】:()
【中文主题词】:
【英文主题词】:
【摘要】:ThiscodeofpracticegivesrecommendationsforthedesignandconstructionofexternalcladdingassembliesforroofandwallsofbuildingsintheUK,usingprofiledsheetingastheexternalsurface.Itdoesnotdealwithprofiledsheetingusedasasupportingsubstrate(decking)toformelementssuchasbuilt-uproofing,structurallycompositeformationsofprofiledmetalsheetingandconcrete,smallelementcladdingsuchassimulatedslatingandtiling,norexceptionalapplicationssuchasbuildingsforcoldstorage.TheprincipalprofiledsheetingmaterialsconsideredinthisBritishstandardaresteel,aluminium,fibrecementandplastics,includingcompositeassembliesofprofiledsheeting,thermalinsulationandlinings.Inadditiontoreferencingperformancerequirements,materialsandcomponentsidentifiedbyBritishStandards,adviceonothermaterialsandcomponentswhichareincommonusebutnotcoveredbyBritishStandardsisalsogiven.NOTE.Formaterialsandcomponentsnotsocovered,evidenceoftheirsatisfactoryperformanceandsuitabilityforuseinparticularconditionsshouldbeobtainedandcarefullyassessed.Forcertainproprietarymaterialsandcomponents,guidancemaybeavailablefromAgrementCertificatesorEuropeanTechnicalApprovals.Attentionisdrawntostatutoryrequirements.
【中国标准分类号】:Q18;P32
【国际标准分类号】:91_060_20;91_060_10
【页数】:62P;A4
【正文语种】:英语