【英文标准名称】:Dimensionsofelectronictubesandvalves-IECdimensions
【原文标准名称】:电子管尺寸.第1部分:IEC尺寸
【标准号】:BS448-1-1981
【标准状态】:现行
【国别】:英国
【发布日期】:1981-04-30
【实施或试行日期】:1981-04-30
【发布单位】:英国标准学会(GB-BSI)
【起草单位】:BSI
【标准类型】:()
【标准水平】:()
【中文主题词】:尺寸;技术制图;电子管结构;阴极射线管;电子管部件;数字标志;换算(计量单位);电子管;插脚;电触点;布置;电子设备及元件;形状;工程图;量规
【英文主题词】:Dimensions;Electricalengineering;Electrontubes;Electronicengineering;Electronicequipmentandcomponents
【摘要】:Providesgeneralinformation,basedrawings,outlinedrawingsandconversiondataforalargerangeofinternationallyusedelectronictubesandvalves.
【中国标准分类号】:L35
【国际标准分类号】:31_100
【页数】:404P;A4
【正文语种】:英语


【英文标准名称】:StandardTestMethodforDeterminationoftheThermalConductivityofAnodeCarbonsbytheGuardedHeatFlowMeterTechnique
【原文标准名称】:用防护热流量计技术测定阳极碳热传导率的标准试验方法
【标准号】:ASTMD6744-2006
【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】:D02.05
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:阳极;煤;热流;材料试验;金属生产和制作业;量表;试验;导热性
【英文主题词】:heatflowmeter;heatfluxtransducer;thermalconductance;thermalconductivity;thermalresistance
【摘要】:Thistestmethodisdesignedtomeasureandcomparethermalpropertiesofmaterialsundercontrolledconditionsandtheirabilitytomaintainrequiredthermalconductancelevels.1.1Thistestmethodcoversasteady-statetechniqueforthedeterminationofthethermalconductivityofcarbonmaterialsinthicknessesoflessthan25mm.Thetestmethodisusefulforhomogeneousmaterialshavingathermalconductivityintheapproximaterange130W/(mK),(thermalresistanceintherangefrom10to400104m2K/W)overtheapproximatetemperaturerangefrom150to600K.Itcanbeusedoutsidetheserangeswithreducedaccuracyforthickerspecimensandforthermalconductivityvaluesupto60W/(mK).Note18212;Itisnotrecommendedtotestgraphitecathodematerialsusingthistestmethod.Graphitesusuallyhaveaverylowthermalresistance,andtheinterfacesbetweenthesampletobetestedandtheinstrumentbecomemoresignificantthanthesampleitself.1.2ThistestmethodissimilarinconcepttoTestMethodsE1530andC518.Significantattentionhasbeenpaidtoensurethatthethermalresistanceofcontactingsurfacesisminimizedandreproducible.1.3ThevaluesstatedinSIunitsareregardedasstandard.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:A29
【国际标准分类号】:17_200_20
【页数】:6P.;A4
【正文语种】: