【英文标准名称】:StandardTestMethodofMeasurementofCommon-EmitterD-CCurrentGainofJunctionTransistors(Metric)
【原文标准名称】:结型晶体管共射板直流电流增盖测量的标准试验方法(米制)
【标准号】:ASTMF528M-1995
【标准状态】:作废
【国别】:美国
【发布日期】:1995
【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】:ASTM
【标准类型】:()
【标准水平】:()
【中文主题词】:电流测量;半导体;方法;晶体管;结型晶体管;共众的
【英文主题词】:transistors;common;method;junctiontransistors;currentmeasurement;semiconductors
【摘要】:
【中国标准分类号】:L42
【国际标准分类号】:31_080_30
【页数】:
【正文语种】:英语


【英文标准名称】:Fireextinguishingmedia—Foamconcentrates—Part4:Specificationforlowexpansionfoamconcentratesforsurfaceapplicationtowater-miscibleliquids
【原文标准名称】:灭火介质.泡沫浓缩物.用于水不溶液体表面的低度膨胀泡沫浓缩物的规范
【标准号】:BSEN1568-4-2008
【标准状态】:现行
【国别】:英国
【发布日期】:2008-03-31
【实施或试行日期】:2008-03-31
【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】:化学性质;定义;灭火剂;灭火器;灭火材料;防火安全;消防;灭火泡沫;流动性;泡沫液体用容器;发泡剂;泡沫材料;液体;低膨胀泡沫;作标记;可混性;pH值;物理性能;规范(验收);表面张力;测试;粘度
【英文主题词】:Chemicalproperties;Definition;Definitions;Extinguishingagents;Fireextinguishers;Fireextinguishingmaterials;Firesafety;Firefighting;Fire-fightingfoam;Flowproperties;Foamliquidcontainers;Foamingagents;Foams;Liquids;Lowexpansionfoam;Marking;Miscibility;pH;Physicalproperties;Specification(approval);Surfacetension;Testing;Viscosity
【摘要】:Thisdocumentspecifiesrequirementsforchemicalandphysicalproperties,andminimumperformancerequirementsoflowexpansionfoamssuitableforsurfaceapplicationtowater-miscibleliquids.Requirementsarealsogivenformarking.IMPORTANT—Inthispartofthedocument,thefireperformanceistestedusingacetoneandisopropanolasthefuel,whichalsoformsthebasisfortheperformanceclassification.However,therearealargenumberofwater-miscibleliquids,whichhavemoreorlessdifferentpropertiestoacetoneandisopropanol.Ithasbeenshownbytestsusingotherfuelsthattheperformanceofvariousfoamscandifferconsiderably.ExamplesofsuchfuelisMethylEthylKetone(MEK).Itisthereforeessentialthattheuserchecksforanyunfavourableorunacceptablelossofefficiencywhenthefoamisusedagainstfiresinanyotherwater-misciblefuelsthanacetoneandisopropanolresepectively.ThefiretestconditionsandproceduregiveninJ.2canbeusedinordertoachieveresultscomparativewithacetoneandisopropanolresepectivelyandrelatedrequirements.Itisalsoessentialfortheusertonote,thatotherfueldepthsandmethodsofapplicationthanthosespecifiedinI.2,cancauseconsiderablelossofefficiencyandthesemattersshouldbecarefullyconsideredbytheuserwhenassessingthesuitabilityforparticularapplications.
【中国标准分类号】:C83
【国际标准分类号】:13_220_10
【页数】:48P.;A4
【正文语种】:英语