SJ 50597.1-1994 半导体集成电路 JT54LS85型LS-TTL四位数值比较器详细规范
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基本信息
标准名称: | 半导体集成电路 JT54LS85型LS-TTL四位数值比较器详细规范 |
英文名称: | Detail specification for type JT54LS85 LS-TTL 4-bit magnitude comparator of semiconductor integrated circuit |
中标分类: |
仪器、仪表 >>
仪器、仪表综合 >>
技术管理 |
发布日期: | 1994-09-30 |
实施日期: | 1994-12-01 |
首发日期: | 1900-01-01 |
作废日期: | 1900-01-01 |
出版日期: | 1900-01-01 |
页数: | 18页 |
适用范围
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前言
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引用标准
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所属分类: 仪器 仪表 仪器 仪表综合 技术管理
【英文标准名称】:SpecificationforNickel
【原文标准名称】:镍规范
【标准号】:ANSI/ASTMB39-1999
【标准状态】:现行
【国别】:美国
【发布日期】:1999
【实施或试行日期】:
【发布单位】:美国国家标准学会(US-ANSI)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:规范(验收);镍
【英文主题词】:specification(approval);nickel
【摘要】:Thisspecificationcoversrefinednickelprimarilyproducedfromoreormatteorsimilarrawmaterial.Theprincipalcommercialformsarecathodes,briquettes,andpellets.Thevaluesstatedininch-poundunitsaretoberegardedasthestandard.Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.ItistheresponsibilityoftheuserofthisstandardtobecomefamiliarwithallhazardsincludingthoseidentifiedintheappropriateMaterialSafetyDataSheetforthisproduct/materialasprovidedbythemanufacturer,toestablishappropriatesafetyandhealthpractices,anddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:H62
【国际标准分类号】:77_120_40
【页数】:
【正文语种】:英语
【英文标准名称】:StandardPracticeforDesignandInstallationofGroundWaterMonitoringWells
【原文标准名称】:设计和安装地下水监测井的标准实施规程
【标准号】:ASTMD5092-2004(2010)e1
【标准状态】:现行
【国别】:美国
【发布日期】:2004
【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】:D18.21
【标准类型】:(Practice)
【标准水平】:()
【中文主题词】:
【英文主题词】:aquifer;boreholedrilling;geophysicalexploration;groundwater;monitoringwell;siteinvestigation;Siteidentification/investigation/selection;Aquifers;Boreholedrilling;Design--ground-watersystems;Fieldtesting--groundwater/aquifers;Geoph
【摘要】:Thispracticeforthedesignandinstallationofgroundwatermonitoringwellswillpromote(1)efficientandeffectivesitehydrogeologicalcharacterization;(2)durableandreliablewellconstruction;and(3)acquisitionofrepresentativegroundwaterqualitysamples,groundwaterlevels,andhydraulicconductivitytestingdatafrommonitoringwells.Thepracticesestablishedhereinareaffectedbygovernmentalregulationsandbysite-specificgeological,hydrogeological,climatological,topographical,andsubsurfacegeochemicalconditions.Tomeetthesegeoenvironmentalchallenges,thispracticepromotesthedevelopmentofaconceptualhydrogeologicmodelpriortomonitoringwelldesignandinstallation.Aproperlydesignedandinstalledgroundwatermonitoringwellprovidesessentialinformationononeormoreofthefollowingsubjects:Formationgeologicandhydraulicproperties;Potentiometricsurfaceofaparticularhydrologicunit(s);Waterqualitywithrespecttovariousindicatorparameters;andWaterchemistrywithrespecttoacontaminantrelease.1.1Thispracticedescribesamethodologyfordesigningandinstallingconventional(screenedandfilter-packed)groundwatermonitoringwellssuitableforformationsrangingfromunconsolidatedaquifers(i.e.,sandsandgravels)togranularmaterialshavinggrain-sizedistributionswithupto50%passinga200sieveandasmuchas20%clay-sizedmaterial(i.e.,siltyfinesandswithsomeclay).Formationsfinerthanthis(i.e.,silts,clays,siltyclays,clayeysilts)shouldnotbemonitoredusingconventionalmonitoringwells,asrepresentativegroundwatersamples,freeofartifactualturbidity,cannotbeassuredusingcurrentlyavailabletechnology.Alternativemonitoringtechnologies(notdescribedinthispractice)shouldbeusedintheseformations1.2Therecommendedmonitoringwelldesignandinstallationprocedurespresentedinthispracticearebasedontheassumptionthattheobjectivesoftheprogramaretoobtainrepresentativegroundwatersamplesandotherrepresentativegroundwaterdatafromatargetedzoneofinterestinthesubsurfacedefinedbysitecharacterization.1.3Thispractice,incombinationwithproperwelldevelopment(D5521),propergroundwatersamplingprocedures(D4448),andproperwellmaintenanceandrehabilitation(D5978),willpermitacquisitionofgroundwatersamplesfreeofartifactualturbidity,eliminatesiltationofwellsbetweensamplingevents,andpermitacquisitionofaccurategroundwaterlevelsandhydraulicconductivitytestdatafromthezonescreenedbythewell.Forwellsinstalledinfine-grainedformationmaterials(upto50%passinga200sieve),itisgenerallynecessarytouselow-flowpurgingandsamplingtechniques(D6771)incombinationwithproperwelldesigntocollectturbidity-freesamples.1.4Thispracticeappliesprimarilytowelldesignandinstallationmethodsusedindrilledboreholes.OtherStandards,includingGuideD6724andPracticeD6725,coverinstallationofmonitoringwellsusingdirect-pushmethods.1.5Thevaluesstatedininch-poundunitsaretoberegardedasstandard,exceptasnotedbelow.ThevaluesgiveninparenthesesaremathematicalconversionstoSIunits,whichareprovidedforinformationonlyandarenotconsideredstandard......
【中国标准分类号】:P13
【国际标准分类号】:13_060_10
【页数】:16P.;A4
【正文语种】:英语