DIN ETS 300117-1992 公共电话转换网络(PSTN)的连接.公共电话转换网络用已标准化的2400比特/秒反向调制解调装置的第2类连接条件

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Product Code:SAE J78
Title:Steel Self-Drilling Tapping Screws
Issuing Committee:Fasteners Committee
Scope: This SAE Standard covers the dimensional and general specifications, including performance requirements, for carbon steel self-drilling tapping screws suitable for use in general applications.It is the objective of this document to insure that carbon steel self-drilling tapping screws, by meeting the mechanical and performance requirements specified, shall drill a hole and form or cut mating threads in materials into which they are driven without deforming their own thread and without breaking during assembly.Appendix A is included to provide a recommended technique for measuring the case depth on the screws.
Rationale: This SAE Standard covers the dimensional and general specifications, including performance requirements, for carbon steel self-drilling tapping screws suitable for use in general applications.It is the objective of this document to insure that carbon steel self-drilling tapping screws, by meeting the mechanical and performance requirements specified, shall drill a hole and form or cut mating threads in materials into which they are driven without deforming their own thread and without breaking during assembly.Appendix A is included to provide a recommended technique for measuring the case depth on the screws.【英文标准名称】:StandardTestMethodforAnalysisofAMS(x03B1;-Methylstyrene)byCapillaryGasChromatography
【原文标准名称】:用毛细管气相色谱对AMS(α-甲基苯乙烯)分析的标准试验
【标准号】:ASTMD6144-2008
【标准状态】:现行
【国别】:美国
【发布日期】:2008
【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】:D16.07
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:acetophenone;alphamethylstyrene;AMS;analysisbygaschromatography;benzene;butenylbenzene;butylbenzene;catechol;cumene;cymene;phenol;propylbenzene;toluene;Gaschromatography(GC)--paints/relatedcoatings/materials;Purityanalysis--paints/re
【摘要】:Thistestmethodissuitableforsettingspecificationsonthematerialsreferencedin1.2andforuseasaninternalqualitycontroltoolwhereAMSisproducedorisusedinamanufacturingprocess.ItmayalsobeusedindevelopmentorresearchworkinvolvingAMS.ThistestmethodisusefulindeterminingthepurityofAMSwithnormalimpuritiespresent.IfextremelyhighboilingorunusualimpuritiesarepresentintheAMS,thistestmethodwouldnotnecessarilydetectthemandthepuritycalculationwouldbeerroneous.1.1ThistestmethodcoversthedeterminationofthepurityofAMS(x03B1;-methylstyrene)bygaschromatography.Calibrationofthegaschromatographysystemisdonebytheexternalstandardcalibrationtechnique.1.2Thistestmethodhasbeenfoundapplicabletothemeasurementofimpuritiessuchascumene,3-methyl-2-cyclopentene-1-one,n-propylbenzene,tert-butylbenzene,sec-butylbenzene,cis-2-phenyl-2-butene,acetophenone,1-phenyl-1-butene,2-phenyl-2-propanol,trans-2-phenyl-2-butene,m-cymene,p-cymene,andphenol,whicharecommontothemanufacturingprocessofAMS.Themethodhasalsobeenfoundapplicableforthedeterminationofpara-tertiary-butylcatecholtypicallyaddedasastabilizertoAMS.TheimpuritiesinAMScanbeanalyzedoverarangeof5to800mg/kgbythismethod.(SeeTable1.)Thelimitofdetectionfortheseimpuritiesistypicallyintherangeof5to10mg/kg.(SeeTable1.)1.3Indeterminingtheconformanceofthetestresultsusingthismethodtoapplicablespecifications,resultsshallberoundedoffinaccordancewiththerounding-offmethodofPracticeE29.1.4ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.5Thisstandarddoesnotpurporttoaddressallthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.Forspecifichazardstatements,seeSection8.
【中国标准分类号】:G17
【国际标准分类号】:71_040_50
【页数】:5P.;A4
【正文语种】:英语