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GB/T 908-1987 锻制圆钢和方钢尺寸、外形、重量及允许偏差

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基本信息
标准名称:锻制圆钢和方钢尺寸、外形、重量及允许偏差
英文名称:Forged round and square steels dimension, shape, weight and tolerance
中标分类: 冶金 >> 钢铁产品 >> 型钢、异型钢
ICS分类: 冶金 >> 钢铁产品 >> 型钢
替代情况:GB 908-1972;被GB/T 908-2008代替
发布部门:中华人民共和国冶金工业部
发布日期:1987-01-20
实施日期:1987-07-01
首发日期:1966-04-18
作废日期:2009-04-01
主管部门:中国钢铁工业协会
提出单位:中华人民共和国冶金工业部
归口单位:全国钢标准化技术委员会
起草单位:抚顺钢厂、冶金部情报标准研究所
起草人:刘德娴、关文光、胡国萃、纪贵
出版社:中国标准出版社
出版日期:1987-06-01
页数:5页
适用范围

本标准适用于直径或边长为50-250 mm锻制圆钢和方钢。

前言

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引用标准

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所属分类: 冶金 钢铁产品 型钢 异型钢 冶金 钢铁产品 型钢
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【英文标准名称】:Milkandmilkproducts-Guidelinesforthestandardizeddescriptionofimmunoassaysorreceptorassaysforthedetectionofantimicrobialresidues.
【原文标准名称】:奶和奶制品.抗菌剂残留物检测的免疫分析或细胞受体检测的规范化的描述指南
【标准号】:NFV04-157-2004
【标准状态】:现行
【国别】:法国
【发布日期】:2004-01-01
【实施或试行日期】:2004-01-05
【发布单位】:法国标准化协会(AFNOR)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:
【英文主题词】:
【摘要】:
【中国标准分类号】:X16;C53
【国际标准分类号】:67_100_01
【页数】:22P;A4
【正文语种】:其他


【英文标准名称】:StandardGuideforDigitalCommunicationProtocolsforComputerizedSystems
【原文标准名称】:计算机系统数字通讯协议的标准指南
【标准号】:ASTMF1757-1996(2008)
【标准状态】:现行
【国别】:美国
【发布日期】:1996
【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】:F25.05
【标准类型】:(Guide)
【标准水平】:()
【中文主题词】:
【英文主题词】:bus;internetwork;localareanetwork(LAN);networkoperatingsystem(NOS);operatingsystem(OS);protocol;ring;star;topology;tree;wideareanetwork(WAN);Communications(marine(shipboard)applications;Computerizedsystems;Digitalcommunication
【摘要】:Thisguideisintendedtoprovideanunderstandingofthewiderangeofcommunicationprotocolsstandards,allowingtheusertounderstandbettertheirapplicabilitytoshipboardnetworksandmarineplatformcomputerizedsystems.Forcomputerizednetworksandsystems,communicationprotocolsarenecessaryforintegratingvarioussystemdevices,providingfunctionalitybetweendissimilarsubnetworks,orforenablingremoteconnections,eitherpiersideorthroughgeophysicalcommunicationtechnologies.Thewidevarietyandscopeofdigitalcommunicationprotocolstandardsaddsgreatlytothecomplexdecisionprocessforspecifyingcompatibleprotocolsforsystemapplicationsandrelateddevicesforthemyriadofpotentialshipboardsystems.However,theusermustidentifytheinitialnetworkingrequirements,sooncethenetworkprotocolsunderevaluationarewellunderstood,thedecisionprocessshoulddeterminetheappropriatenetworkprotocols.Therefore,thisguideisintendedtoreducethecomplexityinvolvedwithprotocolselectionandimplementation.Networkprotocolsdefineanagreed,quantifiableentity,orsetofrules,bywhichusercomputers,systemnetworks,andinternetworkingdevicescommunicateandexchangeinformation.Communicationprotocolsspecifyessentialnetworkingguidelines,suchasphysicalinterfaceconnections,ordataformatandcontroloperationsbetweentwocommunicatingcomputers.Shipandmarinedigitalcommunicationprotocolrequirementsarenodifferentthantheirland-basednetworkedcounterparts.Bothrequirestandardizedprotocolselection,invariousprotocolcategories,includingLANstandards,WANprotocols,LAN/WANprotocols,networkmanagement,wiringhubconfigurations/operations,hardwareplatforms,operatingsystems,andnetworkapplications.1.1Theprincipalcontentofthisguideprovidesaroadmaptoimplementacommunicationnetworkapplicabletoshipandmarinecomputersystemsby:1.1.1Examiningtherelationshipofdigitalcommunicationprotocolsasanetworktechnologicalinfrastructure,1.1.2Outliningthebasicbuildingblocksofnetworktopologiesandtransmissiontechniquesassociatedwiththeimplementationoftransmissionmediainanetworkenvironment;and,1.1.3Identifyingoperatingsystemandenvironments.1.2UsingtheOpenSystemInterconnection(OSI)model,whichprovidesalayeredapproachtonetworkfunctionalityandevaluation,commonnetworkcommunicationsprotocolsareidentifiedandcharacterizedinthisguideaccordingtolowerandupperlayerprotocolscorrespondingtotheirdegreeandtypeoffunctionality.1.3Althoughitisdesirablethatnetworkusers,designers,andadministratorsrecognizeandunderstandeverypossiblenetworkingprotocol,itisnotpossibletoknowtheintimatedetailsofeveryprotocolspecification.Accordingly,thisguideisnotintendedtoaddressfullyeveryhardwareandsoftwareprotocoleverdevelopedforcommercialuse,whichspansaperiodofabout25years.Instead,theuserofthisguidewillbeintroducedtoabriefoverviewofthemajorityofpastandpresentprotocolswhichmaycompriseashipormarineinternetwork,toincludeLocalAreaNetworks(LANs),WideAreaNetworks(WANs),andrelatedhardwareandsoftwarethatprovidesuchnetworkinteroperabilityanddatatransfer.1.4Whilethisguideprovidesanunderstandingofthewiderangeofcommunicationprotocols,theuserisrecommendedtoconsultthereferencematerialforacquiringamorecomprehensiveunderstandingofindividualcommunicationprotocols.However,byexaminingthebasicfunctionsofprotocolsandreviewingtheprotocolcharacterizationcriteriaidentifiedinthisguide,theuserwillbemoreapttounderstandingother......
【中国标准分类号】:L60
【国际标准分类号】:35_100_30
【页数】:14P.;A4
【正文语种】:英语