NF E29-679-1981 气瓶.气瓶阀门颈装配锥螺纹.公称直径16.4.锥度3/20.螺距14国际单位制.量规要求
作者:标准资料网 时间:2024-04-28 23:03:50 浏览:9194
来源:标准资料网
【英文标准名称】:Gascylinders.Taperscrewthreadforvalvestemandcylinderneckassembly.Nominaldiameter16.4-Taper3/20,14TPISI.Gaugerequirements.
【原文标准名称】:气瓶.气瓶阀门颈装配锥螺纹.公称直径16.4.锥度3/20.螺距14国际单位制.量规要求
【标准号】:NFE29-679-1981
【标准状态】:现行
【国别】:法国
【发布日期】:1981-08
【实施或试行日期】:
【发布单位】:法国标准化协会(AFNOR)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:
【英文主题词】:
【摘要】:
【中国标准分类号】:J74
【国际标准分类号】:23_020_30
【页数】:3P;A4
【正文语种】:其他
【英文标准名称】:Mechanicalstandardizationofsemiconductordevices.Part1:Preparationofdrawingsofsemiconductordevices
【原文标准名称】:半导体器件的机械标准化第1部分:半导体器件图形绘制
【标准号】:IEC60191-1-1966
【标准状态】:作废
【国别】:国际
【发布日期】:1966
【实施或试行日期】:
【发布单位】:国际电工委员会(IEC)
【起草单位】:IEC/TC47
【标准类型】:()
【标准水平】:()
【中文主题词】:半导体;作标记;符号;外壳;电气工程;尺寸;电子设备及元件;电子工程;集成电路;半导体器件;电气外壳
【英文主题词】:Dimensions;Electricenclosures;Electricalengineering;Electronicengineering;Electronicequipmentandcomponents;Enclosures;Integratedcircuits;Marking;Semiconductordevices;Semiconductors;Symbols
【摘要】:Givesrecommendedpracticeforthepreparationofdrawings,specifyinggeneralrulesforalldrawingsandadditionalrulesfordeviceandcaseoutlinedrawings,basedrawings,gaugedrawings,andrulesforcoding.
【中国标准分类号】:L04;L40
【国际标准分类号】:01_080_40;31_080_01
【页数】:59P;A4
【正文语种】:英语
【英文标准名称】:StandardTestMethodforOn-LineColorimetricMeasurementofSilica
【原文标准名称】:硅酸盐在线色度测量的标准试验方法
【标准号】:ASTMD7126-2006
【标准状态】:现行
【国别】:
【发布日期】:2006
【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】:D19.03
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:比色的;直线;测量;硅酸盐;试验
【英文主题词】:colorimetric;on-line;processmeasurement;silica
【摘要】:Silicon(Si),ametalloid,isthesecondmostabundantelementintheearthx2019;scrust.Variousformsofsilica(silicondioxideSiO2)arefoundinquartz,sandandrocks.Thedegradationoftheserocksresultsinsilicafoundinnaturalwaters.Silicainnaturalwaterscanbefoundasionicsilica,silicates,colloidalorsuspendedparticles.Elevatedtemperaturesandpressurecancausesilicainwatertovaporizeandformdepositsorscale.Scaledepositsofsilicawillcoatboilersandturbinebladesusedinpowerplants.Thepresenceofsilicascaleaffectstheabilityofmetalstotransferheat.Silicaneedstoberemovedwhendeionizedwaterisusedasarinseformanufacturingwafersinthesemiconductorindustry.Silicaiscommonlyremovedbydemineralizationusinganionexchangeresins,distillation,reverseosmosisorprecipitationinalimesofteningprocess.Theon-linemeasurementofsilicaisthepreferredmethodtolaboratoryanalysesforindustriestryingtoobtainandmonitorultra-purewater.Sincesilicaisoneofthefirstspeciestobreakthroughanionexchangeresins,on-linesilicamonitoringisfrequentlyusedtodeterminetheneedforregenerationofananionormixedresinbed.1.1Thistestmethodcoverstheon-linedeterminationofsolublesilicainwaterbycolorimetricanalysisusingthemolybdenumbluemethod,alsoknownastheheteropolybluemethod.1.2Thistestmethodisapplicableforsilicadeterminationinwaterwithsilicaconcentrationswithin0.5-5000ppb(g/L).1.3ThistestmethodcoversthedeterminationofsolublesilicaSiO2(silicondioxide)orsilicatesinwater.Solublesilicacompoundsareconsideredmolybdatereactivesilica.Thistestmethoddoesnotcoverthedeterminationofcolloidalorpolymericsilica,whichisconsiderednon-molybdatereactivesilica.1.4Thistestmethoddoesnotcoverthelaboratoryorgrabsamplemeasurementofsilicainwater.RefertoTestMethodD859.1.5Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:Z16
【国际标准分类号】:13_060_50
【页数】:3P.;A4
【正文语种】:
