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【英文标准名称】:StandardTestMethodforMeasuringSoftballBatPerformanceFactor
【原文标准名称】:测量垒球球棒性能因数的标准试验方法
【标准号】:ASTMF1890-2009
【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】:F08.26
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:batperformance;BBCOR;BBS;BPF;COR;softballbats;softballs;BPF(batperformancefactor);Coefficientofrestitution(COR);Softballequipment;Sportsequipment
【摘要】:Thistestmethodoffersalaboratorymeanstocomparetheperformanceofasoftballbat.UseofthistestmethodcanprovidesportsgoverningbodiesameanstocomparecalculatedBBSandotherphysicalpropertiesofbats.1.1Thistestmethodcoversamethodfordeterminingbatperformancebymeasuringthebat-ballcoefficientofrestitution(BBCOR),derivingthebatperformancefactor(BPF)andcalculatingabattedballspeed(BBS).Itisapplicabletosoftballbatsofanyconstructionormaterial.Themethodprovidesaquantitativemeasureofbatdynamicperformancethatmaybeusedforcomparisonpurposes.1.2TheBBCOR,BPF,andBBSareeachcalculatedfrommeasurementstakeninthelaboratoryontestequipmentmeetingtherequirementsdefinedinthisspecification.1.3Thevaluesstatedininch-poundunitsaretoberegardedasstandard.ThevaluesgiveninparenthesesaremathematicalconversionstoSIunitsthatareprovidedforinformationonlyandarenotconsideredstandard.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatoryrequirementspriortouse.
【中国标准分类号】:Y56
【国际标准分类号】:97_220_40
【页数】:4P.;A4
【正文语种】:英语


【英文标准名称】:Preferreddiametersofwireterminationsofcapacitorsandresistors
【原文标准名称】:电容器和电阻器引线的优先直径
【标准号】:IEC60301-2012
【标准状态】:现行
【国别】:国际
【发布日期】:2012-07
【实施或试行日期】:
【发布单位】:国际电工委员会(IX-IEC)
【起草单位】:IEC/TC40
【标准类型】:()
【标准水平】:()
【中文主题词】:电缆连接件;电容器;元部件;直径;尺寸规格;电缆线;导电体;电气元件;电气工程;电子工程;优先数;优先尺寸;优选值;电阻器;引线;引出线
【英文主题词】:Cablejunctions;Capacitors;Components;Diameter;Dimensions;Electriccables;Electricconductors;Electricalcomponents;Electricalengineering;Electronicengineering;Preferrednumbers;Preferredsizes;Preferredvalue;Resistors;Wireleads;Wireterminations
【摘要】:
【中国标准分类号】:L10
【国际标准分类号】:31_040;31_040_01;31_060;31_060_01
【页数】:12P;A4
【正文语种】:英语