BS 4656-22-1988 机床精度及试验方法.第22部分:立式单柱和双柱镗车床规范

作者:标准资料网 时间:2024-04-29 04:13:47   浏览:8868   来源:标准资料网
下载地址: 点击此处下载
【英文标准名称】:Accuracyofmachinetoolsandmethodsoftest-Specificationforverticalboringandturninglathes,singleanddoublecolumntypes
【原文标准名称】:机床精度及试验方法.第22部分:立式单柱和双柱镗车床规范
【标准号】:BS4656-22-1988
【标准状态】:现行
【国别】:英国
【发布日期】:1988-05-31
【实施或试行日期】:1988-05-31
【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】:立式车床;加工公差;机床部件;刀具夹持装置;机床台;设计;车床;准确度;形状公差;定义;尺寸公差;机床;导轨
【英文主题词】:Acceptancespecification;Accuracy;Covers;Definition;Definitions;Dimensions;Flatness(surface);Lathes;Machinetables;Machinetools;Slidevalves;Testequipment;Testing;Testingconditions;Thread-cutting;Tolerances(measurement);Transoms;Turning;Verticalturningandboringlathes
【摘要】:AccuracyrequirementsandgeometricalandpracticaltestswithreferencetoBS3800.
【中国标准分类号】:J54
【国际标准分类号】:25_080_10
【页数】:20P;A4
【正文语种】:英语


下载地址: 点击此处下载
【英文标准名称】:Workplaceairquality-Samplingandanalysisofvolatileorganiccompoundsbysolventdesorption/gaschromatography-Part2:Diffusivesamplingmethod
【原文标准名称】:车间空气质量采用溶剂解析/气相色谱法对挥发性有机物进行采样和分析第2部分:扩散采样法
【标准号】:ISO16200-2-2000
【标准状态】:现行
【国别】:国际
【发布日期】:2000-06
【实施或试行日期】:
【发布单位】:国际标准化组织(IX-ISO)
【起草单位】:ISO/TC146
【标准类型】:()
【标准水平】:()
【中文主题词】:空气质量;工作地点;质量;扩散样品;含量测定;取样;采样设备;气体分析;空气;技术数据单;空气污染;解吸;气相色谱法;金属;化学分析和试验;工作场所安全
【英文主题词】:Air;Airpollution;Airquality;Chemicalanalysisandtesting;Desorption;Determinationofcontent;Diffusivesamplers;Gasanalysis;Gaschromatography;Gasphasechromatography;Metals;Quality;Sampling;Samplingequipment;Technicaldatasheets;Workingplaces;Workplacesafety
【摘要】:ThispartofISO16200givesgeneralguidanceforthesamplingandanalysisofvolatileorganiccompounds(VOCs)inair.ThispartofISO16200isapplicabletoawiderangeofVOCs,includinghydrocarbons,halogenatedhydrocarbons,esters,glycolethers,ketonesandalcohols.AnumberofdevicesandsorbentsarerecommendedforthesamplingoftheseVOCs,eachsorbenthavingadifferentrangeofapplicability.NOTEActivatedcoconutshellcharcoalisfrequentlyused.Verypolarcompoundsmayrequirederivatization;verylowboilingcompoundswillonlybepartiallyretainedbythesorbentsandcanonlybeestimatedqualitatively.Semi-volatilecompoundswillbefullyretainedbythesorbents,butmayonlybepartiallyrecovered.ThispartofISO16200isvalidforthemeasurementofairbornevapoursofVOCsinaconcentrationrangeofapproximately1mg/mto1000mg/mindividualorganicforanexposuretimeof8h.Theupperlimitoftheusefulrangeissetbythesorptivecapacityofthesorbentusedand,subjecttodilutionoftheanalysedsolution,bythelineardynamicrangeofthegaschromatographcolumnanddetectororbythesamplesplittingcapabilityoftheanalyticalinstrumentationused.Thelowerlimitoftheusefulrangedependsonthenoiselevelofthedetectorandonblanklevelsofanalyteand/orinterferingartefactsonthesamplingdevicesorinthedesorptionsolvent.Artefactsaretypicallysub-nanogramforactivatedcharcoal,buthigherlevelsofaromatichydrocarbonshavebeennotedinsomebatches.
【中国标准分类号】:Z15
【国际标准分类号】:13_040_30
【页数】:32P.;A4
【正文语种】:英语