DIN V I-ETS 300302-1-1995 综合服务数字网络(ISDN).可视电话电信业务.第1部分:使用脉冲代码调制编码时手机功能的电声特性;英文版本I-ETS300302-1:1994
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【英文标准名称】:IntegratedServicesDigitalNetwork(ISDN)-Videotelephonyteleservice-Part1:ElectroacousticcharacteristicsforhandsettelephonyfunctionwhenusingPulseCodeModulation(PCM)encoding;EnglishversionI-ETS300302-1:1994
【原文标准名称】:综合服务数字网络(ISDN).可视电话电信业务.第1部分:使用脉冲代码调制编码时手机功能的电声特性;英文版本I-ETS300302-1:1994
【标准号】:DINVI-ETS300302-1-1995
【标准状态】:作废
【国别】:德国
【发布日期】:1995-05
【实施或试行日期】:
【发布单位】:德国标准化学会(DE-DIN)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:话筒;电气工程;定义;电话设备;终端装置;电信设备;电声学;数据通信;脉码调制;电信;电话局;综合服务数字网络;电视电话;试验
【英文主题词】:Communicationservice;Datacommunication;Definitions;Electricalengineering;Electroacoustics;Handsets;Integratedservicesdigitalnetwork;ISDN;Pulse-codemodulation;Telecommunication;Telecommunications;Telephoneequipment;Telephoneservices;Terminaldevices;Testing;Videotelephones
【摘要】:ThedocumentdealswiththeelectroacousticcharacteristicsforterminalequipmentintendedtouseinthevideotelephoneteleserviceintheISDN.
【中国标准分类号】:M11
【国际标准分类号】:33_080
【页数】:17P.;A4
【正文语种】:德语
【英文标准名称】:High-strengthstructuralboltingassembliesforpreloading-Part10:systemHRC-Boltandnutassemblieswithcalibratedpreload.
【原文标准名称】:预加负荷用高强度结构螺栓组件.第10部分:系统HRC.具标定预压的螺栓和螺母组件
【标准号】:NFE25-801-10-2009
【标准状态】:现行
【国别】:法国
【发布日期】:2009-05-01
【实施或试行日期】:2009-05-15
【发布单位】:法国标准化协会(FR-AFNOR)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:验收规范;附件;合金钢;螺栓连接件;标定的;合格;建筑;定义;交货条件;名称与符号;尺寸;外螺纹紧固件;紧固件;功能特性;六角头螺钉;六角螺母;高抗拉;高强度钢;洛氏硬度;制造;处理;材料;机械性能;材料的机械性能;螺母;性能试验;物理性能;预压;预应力的;生产;性能;螺钉;规范(验收);钢;钢管;强度等级;结构金属加工;钢结构作业;试验设备;螺纹;滚丝;垫圈;对边宽度
【英文主题词】:Acceptancespecification;Accessories;Alloysteels;Boltedjoints;Calibrated;Conformity;Construction;Definitions;Deliveryconditions;Designations;Dimensions;External-threadfasteners;Fasteners;Functionalproperties;Hexagonheadscrews;Hexagonnuts;Hightensile;High-tensilesteels;HR;Manufacturing;Marking;Materials;Mechanicalproperties;Mechanicalpropertiesofmaterials;Nuts;Performancetests;Physicalproperties;Preloading;Prestressed;Production;Properties;Screws(bolts);Specification(approval);Steels;Strengthclass;Structuralmetalwork;Structuralsteelwork;Testequipment;Threads;Washers;Widthacrossflats
【摘要】:
【中国标准分类号】:J13
【国际标准分类号】:21_060_01
【页数】:24P;A4
【正文语种】:其他
【英文标准名称】:Infraredfreeairapplications
【原文标准名称】:红外线传输系统.大气作用
【标准号】:BSEN61920-2004
【标准状态】:现行
【国别】:英国
【发布日期】:2004-04-26
【实施或试行日期】:2004-04-26
【发布单位】:英国标准学会(BSI)
【起草单位】:BSI
【标准类型】:()
【标准水平】:()
【中文主题词】:
【英文主题词】:
【摘要】:ThisInternationalStandarddescribestheclassificationofIRdevicesintogroupsandclassesinordertoidentifyandclarifyproblemscausedbymutualinterference.Mutualinterferenceiscausedbytheincreasingparallelapplicationofdifferentinfrared(IR)systems.Duetoitsphysicalcharacteristics,thepossibilityoflocallimitationisaspecialfeatureofIRradiation.Inthisstandard,thewavelengthrangefrom700nmto1600nmisconsidered.AllsystemsbasedonfreeairapplicationwhichintentionallyorunintentionallyuseIRradiationinthisrange,areincluded.ProductswhichunintentionallyemitIRradiation,suchasilluminationequipmentarenotdeemedtobeIRapplicationsystems.Theyare,however,integratedintothisstandardinordertoenablefacilityplannerstotakeintoconsiderationandtoforeseeprovisionsagainstdisturbanceofIRapplicationsystemsbysuchunintentionallyemittedradiation.TheobjectofthisstandardistopreventoratleasttominimizemutualinterferenceandtoallowthecoexistenceofdifferentIRproducts.ItisintendedtoidentifyeachIRproductbyitscharacteristics,accordingtotheclassificationcriteria.ItisnottheobjectofthisstandardtodescribetheconsequencesofinterferencebetweenIRsystemsorsafetyaspectsofopticalradiation.Allapplicationsoffibre-optictechnologyareexcluded.Inthiscontext"freeair"meansfreelyradiatedIRinindoororoutdoorapplications.IftheIRsystemsareusedforinformationtransmission,thisstandardisonlyrelevantinconnectionwiththephysicallayeroftheopensystemsinterconnection(OSI)referencemodel(ISO7498-1).NOTEThereadershouldbeawarethatariskofinterferencebetweendifferentinfraredsystemsasassessedbythisstandardisbasedongeneralparametersandthereforecannottakealltheparametersinvolvedintoaccount.Inmanycasesthepracticalresultsmaydifferfromthoseexpected,forexamplethepositioningofsenderandreceiverandthechoiceofadvancedcodinganddecodingschemes.Allthesefactorsbeyondthephysicallayermayhaveaneffectonthefinalresult.
【中国标准分类号】:L52
【国际标准分类号】:31_260
【页数】:32P;A4
【正文语种】:英语
