【英文标准名称】:Recording-Helical-scandigitalvideocassetterecordingsystemusing6,35mmmagnetictapeforconsumeruse(525-60,625-50,1125-60and1250-50systems)-Part6:SDLformat(IEC61834-6:2000);GermanversionEN61834-6:2000
【原文标准名称】:录音.家用用6,35mm磁带垂直扫描数字视频录音系统.第6部分:SDL格式
【标准号】:EN61834-6-2000
【标准状态】:现行
【国别】:
【发布日期】:2001-07
【实施或试行日期】:2001-07-01
【发布单位】:欧洲标准学会(EN)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:磁带记录;记录;数字的;盒式录象带;操作支出;规范(验收);螺旋扫描记录(法);视频记录;盒式磁带;压缩;数字录制技术;磁带;记录系统;娱乐电子学;数字记录法
【英文主题词】:Cassettes(magnetictapes);Compression;Digital;Digitalrecordingmethods;Digitalrecordingtechnique;Entertainmentelectronics;Helicalscanrecording;Magnetictaperecordings;Magnetictapes;Operatingexpenses;Recording;Recordingsystems;Specification(approval);Videocassettes;Videorecording
【摘要】:
【中国标准分类号】:M71
【国际标准分类号】:33_160_40
【页数】:47P.;A4
【正文语种】:英语


【英文标准名称】:StandardPracticeforCarbonBlack,Pelleted8212;Reduction,Blending,andDryingofGrossSamplesforTesting
【原文标准名称】:试验用大颗粒、准圆度混合、干燥碳黑样品的标准实施规程
【标准号】:ASTMD5817-2003a
【标准状态】:现行
【国别】:
【发布日期】:2003
【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】:D24.61
【标准类型】:(Practice)
【标准水平】:()
【中文主题词】:炭黑.(粒状);粒状炭黑;炭黑;混合
【英文主题词】:carbonblack;pelletedcarbonblack;reducingandblendingcarbonblack;
【摘要】:Severaltestmethodsforcarbonblackrequirethereductioninsamplesizeortheblendingofthetestsampletoreducethevariationofthemeasuredcharacteristic.Otherfactorsbeingequal,largersampleswilltendtobemorerepresentativeofthetotalsupply.Thispracticeprovidesproceduresforreducingthelargesampleobtainedfromthebagandbulksamplingpracticestoaconvenientsizeforconductinganumberofteststodescribethematerialandmeasureitsqualityinsuchamannerthatthesmallerportionismostlikelytobearepresentationofthebulksample.Failuretofollowtheproceduresinthispracticecouldresultinprovidinganonrepresentativesampletobeusedinsubsequenttesting.Individualtestmethodsprovideforminimumamountsofmaterialtobetested.TestMethodA,ReductionofSampleSize,istypicallyusedtoobtainanaliquotfromalargesample,splittingablackintotwoormoreequalportions,orreducingablendedblackfromTestMethodBtoaspecifiedsamplesize.Thefinalsampleisalwayssmallerthantheoriginalsampleandwouldnotbeconsideredtobeax201C;wellblendedx201D;sample.TestMethodB,BlendingofCarbonBlack,istypicallyusedtoprepareahomogeneoussample.Thehomogeneoussamplemaybeusedforseveraltests(seeNote3)ormaybereducedinsizebyTestMethodA.Thefinalsamplesizeisthesameastheoriginal.Whenasampleistobeblendedandreduced,thesampleshouldbeblended(TestMethodB)beforereduction(TestMethodA).Theblendingandreductionmustbedonebeforethesampleisdried(TestMethodC).1.1Thispracticedescribestheprocedureforblendingofpelletedcarbonblack,theprocedureforthereductionofgrosssamplesofpelletedcarbonblacktotheappropriatesizefortestingandthepreparationofthesamplefortesting.Thesetechniquesareintendedtominimizevariationsinmeasuredcharacteristicsbetweentestsamples.StandardterminologyrelatingtocarbonblacksamplesisfoundinTerminologyD3053.1.2ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesgiveninparenthesesareforinformationonly.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:Q53
【国际标准分类号】:71_060_10
【页数】:3P.;A4
【正文语种】: