SL 144.9-2008 快速溶剂萃取仪校验方法
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来源:标准资料网
基本信息
标准名称: | 快速溶剂萃取仪校验方法 |
中标分类: |
仪器、仪表 >>
其他仪器仪表 >>
水文与水利仪器 |
ICS分类: |
数学、自然科学 >>
地质学、气象学、水文学
|
替代情况: | 替代SL 144-1995 |
发布部门: | 中华人民共和国水利部 |
发布日期: | 2008-06-17 |
实施日期: | 2008-09-17 |
首发日期: | |
作废日期: | |
出版社: | 中国水利水电出版社 |
出版日期: | 2008-09-17 |
页数: | 6 |
适用范围
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前言
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目录
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引用标准
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所属分类: 仪器 仪表 其他仪器仪表 水文与水利仪器 数学 自然科学 地质学 气象学 水文学
Product Code:SAE J2844
Title:R-1234yf (HFO-1234yf) New Refrigerant Purity and Container Requirements for Use in Mobile Air-Conditioning Systems
Issuing Committee:Interior Climate Control Fluids Committee
Scope:This SAE Standard applies to new refrigerant used in motor vehicle passenger air-conditioning (A/C) systems designed to use R-1234yf, including belt and electrically driven compressors. Refrigerant for use in hermetically sealed, refrigerated cargo systems is not covered by this document.【英文标准名称】:LocalareanetworksCSMA/CD10Mbit/sbasebandplanningandinstallationguide
【原文标准名称】:CSMA/CD10Mbit/s基带的局域网规划和安装指南
【标准号】:IEC60907-1989
【标准状态】:现行
【国别】:国际
【发布日期】:
【实施或试行日期】:
【发布单位】:国际电工委员会(IEC)
【起草单位】:JTC1/SC2
【标准类型】:()
【标准水平】:()
【中文主题词】:
【英文主题词】:
【摘要】:Thisreportisintendedtoassistintheplanning,design,installationandsystemtestingofthestandardCSMA/CD*basebandLAN,accordingtoDraftInternationalStandardISO/DIS8802/3.Themaincomponentofthetransmissionmedium,atrunkcableofuniquedesignandspecification,requiresnospecialinstallationtechniques.Inadditiontothepassivetrunkcablethenetworksystemcomprisesterminators,dropcables,mediumattachmentunit(MAU)andrepeaters.Theseitems,onceinstalledandconnectedtogetherconstitutethetransmissionmediumthatsupportsthelocalareanetwork(LAN).Simplicityofinstallationandflexibilityoflayoutareimportantcharacteristicsoftheapproachinprovidingahigh-performance,high-integritylocalareanetwork.Equallyimportantistheeasewithwhichasystemmaybeenlargedtocopewithexpandingneeds.Asmallnetworksystemconcentratedononefloor,supportingasmallnumberofdataterminalequipments(DTEs)maybeprogressivelyenlargedtoafinalsystemservicinganentiremulti-storeybuildingwithupto1024unitsofdataterminalequipments(seeAppendixC).SuchasystemmayalsobeconnectedtoremoteDTEsofsystemsviaacommunicationsgatewayandexternaltransmissionlines.Clearly,theplanningandinstallationactivitywillvarygreatlydependingonthesizeandcomplexityofthesystem.Successfulnetworkoperationistheend-productofgoodandthoroughplanning.Theplannerwillevaluatetherestrictionsimposedbythebuildinglease,typeofstructure,facilitiesrequirements,healthandsafetyregulations,equipmentlocationandquantity,cableperformancespecifications,floorplanandbudget.Thekeyactivitiesconsistentwiththeaboveare:toplananddesignthecablerouteaccordingtothedistributionoftheDTEs;toinstallthenetworkhardware;totestthenetworkhardware.
【中国标准分类号】:L78
【国际标准分类号】:35_110
【页数】:
【正文语种】:其他