GB 6138-1985 攻丝前钻孔用直柄阶梯麻花钻
时间:2024-05-18 09:06:06 来源: 标准资料网 作者：标准资料网 阅读：9183
基本信息
| 标准名称： | 攻丝前钻孔用直柄阶梯麻花钻 |
| 中标分类： |
机械 >>
工艺装备 >>
刀具 |
| 替代情况： | 被GB/T 6138.1-1997代替 被GB/T 6139-1997代替 |
| 发布日期： | 1900-01-01 |
| 实施日期： | 1986-03-01 |
| 首发日期： | 1900-01-01 |
| 作废日期： | 1900-01-01 |
| 出版日期： | 1900-01-01 |
| 页数： | 4页 |
适用范围
没有内容
前言
没有内容
目录
没有内容
引用标准
没有内容
所属分类： 机械 工艺装备 刀具
【英文标准名称】:Waterquality-Microbiologicalmethods-Guidetotheenumerationofmicro-organismbyculture
【原文标准名称】:水质.第4部分:微生物法.第2节:微生物培养计数指南
【标准号】:BS6068-4.2-1989
【标准状态】:作废
【国别】:英国
【发布日期】:1989-07-31
【实施或试行日期】:1989-07-31
【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】:水;职业安全;试样制备;精密度;生物分析和试验;生物危害;水污染;水质试验;培养基;置信限;误差;计数方法(微生物学);试剂溶液;估计;生物水污染物;细菌计数方法;灭菌;微生物分析;培养技术;卫生学;质量
【英文主题词】:quality;tests;testing;determination;microorganisms;water;microbiologicalanalysis
【摘要】:
【中国标准分类号】:Z16
【国际标准分类号】:07_100_20
【页数】:18P.;A4
【正文语种】:英语
【英文标准名称】:StandardTestMethodforDeterminingAirChangeinaSingleZonebyMeansofaTracerGasDilution
【原文标准名称】:用示踪气体稀释法测定单区内空气变化的标准试验方法
【标准号】:ASTME741-2000(2006)e1
【标准状态】:现行
【国别】:美国
【发布日期】:2000
【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】:E06.41
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:airchange;airchangeflow;airchangerate;airchangesperhour;airexchange;airleakage;airleakagerate;concentration;tracergas;concentrationdecay;constantconcentration;constantinjection;envelope;building;exfiltration;infiltration;tr
【摘要】:EffectsofAirChange8212;Airchangeoftenaccountsforasignificantportionoftheheatingorair-conditioningloadofabuilding.Italsoaffectsthemoistureandcontaminantbalancesinthebuilding.Moisture-ladenairpassingthroughthebuildingenvelopecanpermitcondensationandcausematerialdegradation.Anappropriatelevelofventilationisrequiredinallbuildings;oneshouldconsultASHRAEStandard62todeterminetheventilationrequirementsofabuilding.PredictionofAirChange8212;Airchangedependsonthesizeanddistributionofairleakagesites,pressuredifferencesinducedbywindandtemperature,mechanicalsystemoperation,andoccupantbehavior.Airchangemaybecalculatedfromthisinformation,however,manyoftheneededparametersaredifficulttodetermine.Tracergastestingpermitsdirectmeasurementofairchange.UtilityofMeasurement8212;Measurementsofairchangeprovideusefulinformationaboutventilationandairleakage.Measurementsinbuildingswiththeventilationsystemclosedareusedtodeterminewhethernaturalairleakageratesarehigherthanspecified.Measurementswiththeventilationsysteminoperationareusedtodeterminewhethertheairchangemeetsorexceedsrequirements.KnownConditions8212;Knowledgeofthefactorsthataffectairchangemakesmeasurementmoremeaningful.Relatingbuildingresponsetowindandtemperaturerequiresrepetitionofthetestundervaryingmeteorologicalconditions.Relatingbuildingresponsetotheventilationsystemortooccupantbehaviorrequirescontrolledvariationofthesefactors.ApplicabilityofResults8212;Thevaluesforairchangeobtainedbythetechniquesusedinthistestmethodapplytothespecificconditionsprevailingatthetimeofthemeasurement.Airchangevaluesforthesamebuildingwilldifferiftheprevailingwindandtemperatureconditionshavechanged,iftheoperationofthebuildingisdifferent,oriftheenvelopechangesbetweenmeasurementsbecauseofconstructionordeterioration.Todetermineairleakagesites,followPracticeE1186.FanPressurization8212;Arelatedtechnique(TestMethodE779)usesafantopressurizethebuildingenvelope.Measurementsofcorrespondingairflowsandpressuredifferencesacrosstheenvelopecharacterizeenvelopeairtightnessaseithertheairleakagerateunderspecifiedinducedpressuredifferencesortheequivalentleakageareaoftheenvelope.Thesefactorspermitmodelingnaturalairchangeduetowindandtemperaturedifferences.However,directmeasurementofnaturalairchangeisnotpossiblewithTestMethodE779.TestMethodE779permitscomparisonofdifferentbuildings,isolationofleakagesites,andevaluationofretrofitmeasures.1.1Thistestmethodcoverstechniquesusingtracergasdilutionfordeterminingasinglezone''sairchangewiththeoutdoors,asinducedbyweatherconditionsandbymechanicalventilation.Thesetechniquesare:(1)concentrationdecay,(2)constantinjection,and(3)constantconcentration.1.2Thistestmethodisrestrictedtoanysingletracergas.Theassociateddataanalysisassumesthatonecancharacterizethetracergasconcentrationwithinthezonewithasinglevalue.Thezoneshallbeabuilding,vehicle,testcell,oranyconformingenclosure.1.3Useofthistestmetho......
【中国标准分类号】:Z15
【国际标准分类号】:13_040_01
【页数】:17P.;A4
【正文语种】:英语