DIN ETS 300264-1994 综合服务数字网络(ISDN).可视电话电信业务.业务说明;英文版本ETS300264:1994
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【英文标准名称】:IntegratedServicesDigitalNetwork(ISDN)-Videotelephonyteleservice-Servicedescription;EnglishversionETS300264:1994
【原文标准名称】:综合服务数字网络(ISDN).可视电话电信业务.业务说明;英文版本ETS300264:1994
【标准号】:DINETS300264-1994
【标准状态】:现行
【国别】:德国
【发布日期】:1994-11
【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】:附加服务;综合服务数字网络;电视电话;电视电话;电信设备;通信网;电信;电信;电话网;服务定义
【英文主题词】:Communicationnetworks;Communicationservice;Integratedservicesdigitalnetwork;ISDN;Servicedefinition;Supplementaryservices;Telecommunication;Telecommunications;Telephonenetworks;Videotelephones;Videotelephony
【摘要】:Thedocumentdefinesthestage1ofthevideotelephonyteleservicefortheeuropeanISDN.
【中国标准分类号】:M21
【国际标准分类号】:33_080
【页数】:22P.;A4
【正文语种】:德语
【英文标准名称】:StandardTestMethodforLuminousReflectanceFactorofAcousticalMaterialsbyUseofIntegrating-SphereReflectometers
【原文标准名称】:使用集成球形反射计测定音响材料反光因素的标准试验方法
【标准号】:ASTME1477-1998a(2008)
【标准状态】:现行
【国别】:美国
【发布日期】:1998
【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】:E12.02
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:acousticalmaterials;integratingsphere;luminousreflectancefactor;reflectometer;Acousticalmaterials/applications;CIEcolor-scalesystem;Integratingspherereflectometer;Luminousreflectancefactor;Opticalmaterials/properties/tests;Reflectomet
【摘要】:Acousticalmaterialsareoftenusedastheentireceilingofroomsandarethereforeanimportantcomponentofthelightingsystem.Theluminousreflectanceofallimportantcomponentsmustbeknowninordertopredictthelevelofilluminationthatwillbeobtained.Thereflectingpropertiesofasurfacearemeasuredrelativetothoseofastandardreflector,theperfectreflectingdiffuser,toprovideareflectancefactor.Theluminousreflectancefactoriscalculatedforastandardilluminant,andastandardobserver,forthestandardhemispherical(integrating-sphere)geometryofilluminationandviewing,inwhichallreflectedradiationfromanareaofthesurfaceiscollected.Inthiswaythereflectingpropertiesofanacousticalmaterialcanberepresentedbyasinglenumbermeasuredandcalculatedunderstandardconditions.Acousticalmaterialsgenerallyhaveanon-glossywhiteornear-whitefinish.Thetypesofsurfacecoverawiderangefromsmoothtodeeplyfissured.Measurementwithintegrating-spherereflectometershasbeensatisfactoryalthoughmultiplemeasurementsmayberequiredtosamplethesurfaceadequately.Instrumentswithothertypesofopticalmeasuringsystemsmaybeusedifitcanbedemonstratedthattheyprovideequivalentresults.TheuseofthistestmethodfordeterminingtheluminousreflectancefactorisrequiredbyClassificationE1264.1.1Thistestmethodcoversthemeasurementoftheluminousreflectancefactorofacousticalmaterialsforuseinpredictingthelevelsofroomillumination.1.2Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:M72
【国际标准分类号】:91_120_20
【页数】:2P.;A4
【正文语种】:英语
Product Code:SAE J1053M
Title:Steel Stamped Nuts of One Pitch Thread Design--Metric Series
Issuing Committee:Fasteners Committee
Scope: Included herein are general, dimensional, and performance specifications for those types, styles, and sizes of stamped nuts of one pitch thread design recognized as SAE Standard. These nuts are intended for general use where the engagement of a single thread on the mating screw or unthreaded stud is considered adequate for the application. For the inch equivalent of this document, see SAE J1053.
