SAE AMS7903 Beryllium Bars, Rods, Tubing, and Shapes 4.25beo 94be High Micro-Yield Strength
作者:标准资料网 时间:2024-05-12 17:38:37 浏览:8805
来源:标准资料网
Product Code:SAE AMS7903
Title:Beryllium Bars, Rods, Tubing, and Shapes 4.25beo 94be High Micro-Yield Strength
Issuing Committee:Ams G Titanium And Refractory Metals Committee
Scope:This specification covers beryllium in the form of bars, rods, tubing, and machined shapes from vacuum hot pressed powder.
【英文标准名称】:Acoustics-Determinationofsoundpowerradiatedintoaductbyfansandotherair-movingdevices-In-ductmethod(ISO5136:2003);GermanversionENISO5136:2003
【原文标准名称】:声学.风机和其他风动设备辐射入管道中的声功率的测定.管道法
【标准号】:DINENISO5136-2003
【标准状态】:作废
【国别】:德国
【发布日期】:2003-10
【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】:声功率;噪声(环境的);声强;声级;导管风扇;声学;响度;测定;通风机;声学测量;声学试验;音量;定义;风扇;试验;噪声测量;管道法
【英文主题词】:Acousticmeasurement;Acoustictesting;Acoustics;Definitions;Determination;Ductmethods;Ductedfans;Fans;Loudnesslevels;Measurement;Measuringresults;Measuringtechniques;Noise(environmental);Noisemeasurements;Powerlevels;Sound;Soundintensity;Soundlevel;Soundpower;Testing;Ventilators;Volume(sound)
【摘要】:Thisstandardsspecifiesamethodforthemeasurementofthesoundpowerradiatedintoaductbyfansandotheraerodynamicsoundsources(dampers,throttles,boxes).Thestandardismainlyintendedformeasurementsofair-movingdevices,forthemeasurementofflownoisefromair-handling(passive)unitsISO7235isrecommended.Thesourceundertestmustemitsteadynoise.Themeasurementsarecarriedoutinductswithcircularcrosssectionsbetween0,15mand2m.Normativeannexesdescribemeasurementsinductswithdiametersbetween0,07mand7m.Theairtemperatureduringthemeasurementsmustliebetween-50?und+70?atflowvelocitiesofupto40m/s(informativeupto60m/s)atamaximumpermissibleswirlangleof15?Measurementsarecarriedoutinone-third-octavebandsbetween50Hzand10000Hz(informative20000Hz).#,,#
【中国标准分类号】:Z32
【国际标准分类号】:17_140_20;23_120
【页数】:75P.;A4
【正文语种】:德语
【英文标准名称】:Graphicsymbolsforgridandmappingdiagramsusedincabletelevisionsystems
【原文标准名称】:有线电缆电视系统用栅格和测试图中的图形符号
【标准号】:IEEE623-1976
【标准状态】:作废
【国别】:美国
【发布日期】:1976
【实施或试行日期】:
【发布单位】:美国电气电子工程师学会(IEEE)
【起草单位】:IEEE
【标准类型】:()
【标准水平】:()
【中文主题词】:线路图;电缆电视;电视;图解表示法;图形表示;图形符号;图示;电气工程
【英文主题词】:cabletelevision;graphicsymbols;circuitdiagrams;television;graphicrepresentation;electricalengineering;diagrams
【摘要】:
【中国标准分类号】:M74
【国际标准分类号】:01_080_30
【页数】:
【正文语种】:英语
