HB 3992-1987 平面支承帽
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基本信息
| 标准名称： | 平面支承帽 |
| 中标分类： | 机械 >> 工艺装备 >> 组合卡具 |
| 发布日期： | 1987-04-08 |
| 实施日期： | 1987-07-01 |
| 首发日期： | 1900-01-01 |
| 作废日期： | 1900-01-01 |
| 出版日期： | 1900-01-01 |
| 页数： | 1页 |
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所属分类： 机械 工艺装备 组合卡具
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【英文标准名称】:Informationtechnology--Computergraphics--Metafileforthestorageandtransferofpicturedescriptioninformation--Part3:Binaryencoding
【原文标准名称】:信息技术.计算机图形.图像说明信息的存储和传送用元文件.第3部分:二进制编码
【标准号】:JISX4213-2002
【标准状态】:现行
【国别】:日本
【发布日期】:2002-08-20
【实施或试行日期】:
【发布单位】:日本工业标准调查会(JP-JISC)
【起草单位】:TechnicalCommitteeonInformationTechnology
【标准类型】:()
【标准水平】:()
【中文主题词】:
【英文主题词】:
【摘要】:この規格は,CGMの2進符号化を規定する。
【中国标准分类号】:L81
【国际标准分类号】:35_140
【页数】:82P;A4
【正文语种】:日语
【英文标准名称】:StandardPracticeforSamplingandCountingAirborneFibers,IncludingAsbestosFibers,inMinesandQuarries,byPhaseContrastMicroscopyandTransmissionElectronMicroscopy
【原文标准名称】:用相位比对显微镜和相位传输显微镜取样和计数矿场和采石场内的空气纤维(包含石棉纤维)的标准实施规程
【标准号】:ASTMD7200-2006
【标准状态】:现行
【国别】:
【发布日期】:2006
【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】:D22.04
【标准类型】:(Practice)
【标准水平】:()
【中文主题词】:石棉;对比度;计数;电子显微镜;纤维;显微术;矿;相位;露天矿;取样;传输
【英文主题词】:airmonitoring;asbestos;fibers;membranefiltermethod;minesandquarries;phasecontrastmicroscopy;samplingandanalysis
【摘要】:1.1Thispracticedescribesthedeterminationoftheconcentrationoffibers,expressedasthenumberofsuchfiberspermillilitreofair,usingphasecontrastmicroscopyandoptionallytransmissionelectronmicroscopytoevaluateparticulatematerialcollectedonamembranefilterinthebreathingzoneofanindividualorbyareasamplinginaspecificlocation.ThispracticeisbasedonthecoreproceduresprovidedintheInternationalOrganizationforStandardization(ISO)StandardISO8672(1),theNationalInstituteforOccupationalandHealth(NIOSH)ManualofAnalyticalMethods,NIOSH7400(2),andtheOccupationalSafetyandHealthAdministration(OSHA)MethodID160(3).Thispracticeindicatestheimportantpointswherethesemethodsdiffer,andprovidesinformationregardingthedifferences.However,selectingportionsofproceduresfromdifferentpublishedmethodsgenerallyrequiresausertoreportthattheyhaveusedamodificationtoamethodratherthanclaimtheyhaveusedthemethodaswritten.Thispracticefurthergivesguidanceonhowdifferentialcountingtechniquesmaybeusedtoindicatewhereapopulationoffibersmaybeasbestos.1.2Thepracticeisusedforroutinedeterminationofanindexofoccupationalexposuretoairbornefibersinmines,quarries,orotherlocationswhereoremaybeprocessedorhandled.Themethodgivesanindexofairbornefiberconcentration.Themethodprovidesanestimateofthefractionofcountedfibersthatmaybeasbestos.Thispracticeshouldbeusedinconjunctionwithelectronmicroscopy(SeeAppendixX1)forassistanceinidentificationoffibers.1.3Thispracticespecifiestheequipmentandproceduresforsamplingtheatmosphereinthebreathingzoneofanindividualandfordeterminingthenumberoffibersaccumulatedonafiltermembraneduringthecourseofanappropriately-selectedsamplingperiod.Themethodmayalsobeusedtosampletheatmosphereinaspecificlocationinamineorinaroomofabuilding(areasampling).1.4Theidealworkingrangeofthispracticeextendsfrom100fibers/mm2to1300fibers/mm2offilterarea.Fora1000-Lairsample,thiscorrespondstoaconcentrationrangefromapproximately0.04to0.5fiber/mL(orfiber/cm3).Lowerandhigherrangesoffiberconcentrationcanbemeasuredbyreducingorincreasingthevolumeofaircollected.However,whenthispracticeisappliedtopersonalsamplinginminesandquarries,theleveloftotalsuspendedparticulatemayimposeanupperlimittothevolumeofairthatcanbesampledifthefiltersproducedaretobeofappropriateparticulateloadingforfibercounting.1.5UsersshoulddeterminetheirownlimitofdetectionusingtheprocedureinPracticeD6620.Forreference,theNIOSH7400methodgivesthelimitofdetectionas7fibers/mm178;offilterarea.Fora1000-Lairsample,thiscorrespondstoalimitofdetectionof0.0027fiber/mL(orfiber/cm179;).ForOSHAID160thelimitofdetectionisgivenas5.5fibers/mm178;offilterarea.Fora1000-Lairsample,thiscorrespondstoalimitofdetectionof0.0022fiber/mL(orfiber/cm179;).1.6Ifthispracticeyieldsafiberconcentrationthatdoesnotexceedone-halfthepermissibleexposurelimitorthresholdlimitvaluefortheparticularregulatedfibervariety,nofurtheractionmaybenecessary.Ifthefiberconcentrationexceedsone-halfoftheregulatedpermissibleexposurelimitorthresholdlimitvaluefortheparticularregulatedfibervariety,examinethedatatodetermineifmorethan50%ofthecountedfibersmaybebundles,fiberslongerthan10956;m,orfibersthinnerthan1.0956;m.Ifthesecountsexceed50%ofthetotalcount,thenthereisanincreasedpossibilitythatasbestosispresentinthesample.UsetheoptionalmethodspecifiedinAppendixX1tomeasuretheconcentrationorproportionofthe......
【中国标准分类号】:C70
【国际标准分类号】:13_040_30
【页数】:24P.;A4
【正文语种】:
【原文标准名称】:信息技术.计算机图形.图像说明信息的存储和传送用元文件.第3部分:二进制编码
【标准号】:JISX4213-2002
【标准状态】:现行
【国别】:日本
【发布日期】:2002-08-20
【实施或试行日期】:
【发布单位】:日本工业标准调查会(JP-JISC)
【起草单位】:TechnicalCommitteeonInformationTechnology
【标准类型】:()
【标准水平】:()
【中文主题词】:
【英文主题词】:
【摘要】:この規格は,CGMの2進符号化を規定する。
【中国标准分类号】:L81
【国际标准分类号】:35_140
【页数】:82P;A4
【正文语种】:日语
【英文标准名称】:StandardPracticeforSamplingandCountingAirborneFibers,IncludingAsbestosFibers,inMinesandQuarries,byPhaseContrastMicroscopyandTransmissionElectronMicroscopy
【原文标准名称】:用相位比对显微镜和相位传输显微镜取样和计数矿场和采石场内的空气纤维(包含石棉纤维)的标准实施规程
【标准号】:ASTMD7200-2006
【标准状态】:现行
【国别】:
【发布日期】:2006
【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】:D22.04
【标准类型】:(Practice)
【标准水平】:()
【中文主题词】:石棉;对比度;计数;电子显微镜;纤维;显微术;矿;相位;露天矿;取样;传输
【英文主题词】:airmonitoring;asbestos;fibers;membranefiltermethod;minesandquarries;phasecontrastmicroscopy;samplingandanalysis
【摘要】:1.1Thispracticedescribesthedeterminationoftheconcentrationoffibers,expressedasthenumberofsuchfiberspermillilitreofair,usingphasecontrastmicroscopyandoptionallytransmissionelectronmicroscopytoevaluateparticulatematerialcollectedonamembranefilterinthebreathingzoneofanindividualorbyareasamplinginaspecificlocation.ThispracticeisbasedonthecoreproceduresprovidedintheInternationalOrganizationforStandardization(ISO)StandardISO8672(1),theNationalInstituteforOccupationalandHealth(NIOSH)ManualofAnalyticalMethods,NIOSH7400(2),andtheOccupationalSafetyandHealthAdministration(OSHA)MethodID160(3).Thispracticeindicatestheimportantpointswherethesemethodsdiffer,andprovidesinformationregardingthedifferences.However,selectingportionsofproceduresfromdifferentpublishedmethodsgenerallyrequiresausertoreportthattheyhaveusedamodificationtoamethodratherthanclaimtheyhaveusedthemethodaswritten.Thispracticefurthergivesguidanceonhowdifferentialcountingtechniquesmaybeusedtoindicatewhereapopulationoffibersmaybeasbestos.1.2Thepracticeisusedforroutinedeterminationofanindexofoccupationalexposuretoairbornefibersinmines,quarries,orotherlocationswhereoremaybeprocessedorhandled.Themethodgivesanindexofairbornefiberconcentration.Themethodprovidesanestimateofthefractionofcountedfibersthatmaybeasbestos.Thispracticeshouldbeusedinconjunctionwithelectronmicroscopy(SeeAppendixX1)forassistanceinidentificationoffibers.1.3Thispracticespecifiestheequipmentandproceduresforsamplingtheatmosphereinthebreathingzoneofanindividualandfordeterminingthenumberoffibersaccumulatedonafiltermembraneduringthecourseofanappropriately-selectedsamplingperiod.Themethodmayalsobeusedtosampletheatmosphereinaspecificlocationinamineorinaroomofabuilding(areasampling).1.4Theidealworkingrangeofthispracticeextendsfrom100fibers/mm2to1300fibers/mm2offilterarea.Fora1000-Lairsample,thiscorrespondstoaconcentrationrangefromapproximately0.04to0.5fiber/mL(orfiber/cm3).Lowerandhigherrangesoffiberconcentrationcanbemeasuredbyreducingorincreasingthevolumeofaircollected.However,whenthispracticeisappliedtopersonalsamplinginminesandquarries,theleveloftotalsuspendedparticulatemayimposeanupperlimittothevolumeofairthatcanbesampledifthefiltersproducedaretobeofappropriateparticulateloadingforfibercounting.1.5UsersshoulddeterminetheirownlimitofdetectionusingtheprocedureinPracticeD6620.Forreference,theNIOSH7400methodgivesthelimitofdetectionas7fibers/mm178;offilterarea.Fora1000-Lairsample,thiscorrespondstoalimitofdetectionof0.0027fiber/mL(orfiber/cm179;).ForOSHAID160thelimitofdetectionisgivenas5.5fibers/mm178;offilterarea.Fora1000-Lairsample,thiscorrespondstoalimitofdetectionof0.0022fiber/mL(orfiber/cm179;).1.6Ifthispracticeyieldsafiberconcentrationthatdoesnotexceedone-halfthepermissibleexposurelimitorthresholdlimitvaluefortheparticularregulatedfibervariety,nofurtheractionmaybenecessary.Ifthefiberconcentrationexceedsone-halfoftheregulatedpermissibleexposurelimitorthresholdlimitvaluefortheparticularregulatedfibervariety,examinethedatatodetermineifmorethan50%ofthecountedfibersmaybebundles,fiberslongerthan10956;m,orfibersthinnerthan1.0956;m.Ifthesecountsexceed50%ofthetotalcount,thenthereisanincreasedpossibilitythatasbestosispresentinthesample.UsetheoptionalmethodspecifiedinAppendixX1tomeasuretheconcentrationorproportionofthe......
【中国标准分类号】:C70
【国际标准分类号】:13_040_30
【页数】:24P.;A4
【正文语种】: