【英文标准名称】:Specificationforinternalmicrometers(includingstickmicrometers)
【原文标准名称】:内径千分尺(包括杆式千分尺)规范
【标准号】:BS959-1950
【标准状态】:作废
【国别】:英国
【发布日期】:1951-01-18
【实施或试行日期】:1951-01-18
【发布单位】:英国标准学会(GB-BSI)
【起草单位】:BSI
【标准类型】:()
【标准水平】:()
【中文主题词】:机械试验;刚度;划刻度;千分尺;精密度;尺寸公差;作标记;内部;量规;线性测量仪器;线性测量
【英文主题词】:dimensionaltolerances;linearmeasuringinstruments;precision;rigidity;graduations;mechanicaltesting;gauges;internal;marking;linearmeasurement;micrometers
【摘要】:Micrometerscomprisingameasuringhead,extensionrodswithorwithoutspacingcollars,handle(insmallersizes).Threesizesofmeasuringhead,ininchandmetricunits.Stickmicrometersformeasurementofgreaterinternallengths(6inor12inmicrometerunit,fittedwithmicrometerof1inrangewhich,withseriesofextensionrods,permitsmeasurementuptomaximumlengthrequired).Material,thimbleandbarrel,micrometerscrew,extensionrods,spacingcollars,adjustment,accuracy,rigidity,handle,gapsettinggauges,marking,caseandpackaging,testmethods.
【中国标准分类号】:J42
【国际标准分类号】:17_040_30
【页数】:16P.;A4
【正文语种】:英语


【英文标准名称】:Guideforselection,installation,useandmaintenanceofapparatusforthedetectionandmeasurementofcombustiblegasesoroxygen
【原文标准名称】:燃气或氧气检验和测量装置的选择、安装、使用和维修指南
【标准号】:BSEN50073-1999
【标准状态】:作废
【国别】:英国
【发布日期】:1999-09-15
【实施或试行日期】:1999-09-15
【发布单位】:英国标准学会(GB-BSI)
【起草单位】:BSI
【标准类型】:()
【标准水平】:()
【中文主题词】:固定的;安全装置;选择;爆炸性环境;维修;便携的;气体检测器;使用说明;电驱动装置;职业安全;永久的;工作环境;试验条件;氧;气体;性能试验;临时的;安全措施;探测器;训练;煤气;工作范围;防火安全;装配;校正;信号装置;检验;人员;工业的;可燃性环境;警报系统;蒸气;防护电气设备
【英文主题词】:Definition;Definitions;Detection;Electricappliances;Electricalappliances;Electricalengineering;Electrically-operateddevices;Flammableatmospheres;Fuelgases;Gasdetectors;Guidebooks;Installations;Measurement;Measuringinstruments;Oxygen;Safetyrequirements;Selection
【摘要】:Thisdocumentgivesguidanceontheselection,installation,useandmaintenanceofelectricallyoperatedGroupIIapparatusintendedforuseinindustrialandcommercialsafetyapplicationsforthedetectionandmeasurementof:·combustiblegases,asdescribedinEN50054,EN50057,EN50058;or·oxygenasdescribedinEN50104.Thisguideisacompilationofpracticalknowledgetoassisttheuser.Combustiblegasdetectionapparatus,fixed,transportableorportable,maybeusedwheneverthereisthepossibilityofarisktolifeorpropertycausedbytheaccumulationofacombustiblegas-airmixture.Suchapparatuscanprovideameansofreducingtheriskbydetectingthepresenceofthecombustiblegasandissuingsuitableaudibleorvisualwarnings.Itmayalsobeusedtoinitiatespecificsafetyprecautions(e.g.plantshutdown,evacuation,operationoffireextinguishingprocedures).Itisapplicabletoallnewpermanentinstallationsand,wherereasonablypracticable,toexistingpermanentinstallations.Itisalsoapplicabletotemporaryinstallations,whetherneworexisting.Thisguideisnotintended,butmayprovideusefulinformation,forthefollowing:·apparatusintendedforthemeasurementofoxygendeficiencywhichmayaffecthumanhealth;·apparatusintendedonlyforthedetectionofnon-combustibletoxicgases;·apparatusoflaboratoryorscientifictypeintendedonlyforanalysisormeasurementpurposes;·apparatusintendedforundergroundminingapplications;·apparatusintendedonlyforprocesscontrolapplications.Thisguidedoesnotapplytothefollowing:·apparatusforthedetectionofexplosives;·apparatusintendedforthedetectionofapotentiallycombustibleatmosphereresultingfromdustormistinair;·openpathapparatusnotusedforpointmeasurement.note:1)GroupIIapparatusaresuitableforplaceswithpotentiallyexplosiveatmospheres,otherthanminessusceptibletofiredamp,see4.3.2)Forthepurposeofthisguide,"toxic"covers"toxic","verytoxic"and"harmful"gasesandvapours.
【中国标准分类号】:G93
【国际标准分类号】:13_320
【页数】:28P.;A4
【正文语种】:英语