SJ 1203-1977 6P15(T)输出束射四极管
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来源:标准资料网
基本信息
标准名称: | 6P15(T)输出束射四极管 |
中标分类: |
电子元器件与信息技术 >>
电真空器件 >>
收、发信管 |
发布日期: | |
实施日期: | 1992-05-20 |
首发日期: | |
作废日期: | |
出版日期: | |
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所属分类: 电子元器件与信息技术 电真空器件 收 发信管
基本信息
标准名称: | 高精度卧式车床完好要求和检查评定方法 |
中标分类: |
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发布日期: | 1900-01-01 |
实施日期: | 1997-01-01 |
首发日期: | 1900-01-01 |
作废日期: | 2010-01-20 |
出版日期: | 1900-01-01 |
页数: | 7页 |
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【英文标准名称】:StandardPracticeforPreparationofRockSlabsforDurabilityTesting
【原文标准名称】:岩石板进行耐久性试验前的处理的标准实施规程
【标准号】:ASTMD5121-2010
【标准状态】:现行
【国别】:美国
【发布日期】:2010
【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】:D18.17
【标准类型】:(Practice)
【标准水平】:()
【中文主题词】:
【英文主题词】:defects;diamondsawblade;durability;rocksaw;slabs;Defects;Diamondsawblade;Rockmaterials/properties/analysis;Rocksaw;Slab/slabs;Specimenpreparation(fortesting)--rock
【摘要】:Thispracticeisusedtopreparerockspecimensfordurabilitytestingandtoevaluateanyinternaldefects,suchascracks,thatmaynotbeapparentonthesurfacesofbrokenblocksofrock.SuchevaluationcanalsoaidintheselectionandlocationofslabsfortestingasoutlinedinPracticeD4992.Insomecases,theneedforfurthertestingorevaluationmaybeeliminated.Thesawingofrocksampleswillreducethemtoasuitablespecimensizeandquantityfortestingand,inmanycases,preservethenaturalstructureoftheinternaldefectssothesamplescanbeevaluatedbythevariousdurabilitytests.Durabilitytestsspecimensshouldbe64x00B1;6mm(2.5x00B1;0.25in)thicknormaltobeddingoranypotentialplanesofweaknesswhichmaybeobservedinthesamples.Innocasewillthesizeoftheslabbelessthan125mm(5in.)onaside,excludingthethicknessIdeally,atestspecimensizeequaltotheproposeddesignsizewouldprovidetheultimateincorrelationbetweenlaboratorytestsandactualfieldperformance.However,inmostcases,thisisneitherpracticalnoreconomicallyfeasible.1.1Thispracticecoversthepreparationofrockslabsforvarioustestsandanyvisualinspectionsusedtoevaluatethedurabilityofrockforerosioncontrol.Thesetestsinclude,butarenotlimitedto,TestMethodsD5240,D5312,andD5313.1.2Units8212;ThevaluesstatedinSIunitsaretoberegardedasstandard.Thevaluesgiveninparenthesesaremathematicalconversionstoinch-poundunitsthatareprovidedforinformationonlyandarenotconsideredstandard.1.3AllobservedandmeasuredvaluesshallconformtotheguidelinesforsignificantdigitsandroundingestablishedinPracticeD6026.1.4Thispracticeoffersasetofinstructionsforperformingoneormorespecificoperations.Thisdocumentcannotreplaceeducationorexperienceandshouldbeusedinconjunctionwithprofessionaljudgment.Notallaspectsofthispracticemaybeapplicableinallcircumstances.ThisASTMstandardisnotintendedtorepresentorreplacethestandardofcarebywhichtheadequacyofagivenprofessionalservicemustbejudged,norshouldthisdocumentbeappliedwithoutconsiderationofaproject''smanyuniqueaspects.Thewordx201C;Standardx201D;inthetitleofthisdocumentmeansonlythatthedocumenthasbeenapprovedthroughtheASTMconsensusprocess.1.5Thisstandarddoesnotpurporttoaddressallofthesafetyconcernsassociatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.Foraspecifichazardsstatement,seeSection7.
【中国标准分类号】:Q21
【国际标准分类号】:91_100_15
【页数】:3P.;A4
【正文语种】:英语