BS 4571-1970 有载抽头转换开关规范

上一篇: BS 137 Pt.1-1970 公称电压高于1000V架空线路用瓷或玻璃绝缘子.第1部分:试验方法
下一篇: BS 4579 Pt.1-1970 电缆和电线连接器中机械和压合接头性能规范.第1部分:铜导线的压合接头

【英文标准名称】:Bolts,doublehexagonhead,relievedshank,longthread,intitaniumalloyTI-P64001,MoS2coated-Strengthclass:1100MPa(atambienttemperature)
【原文标准名称】:细杆长螺纹双六角头镀MoS2的钛合金TI-P64001螺栓.强度等级:1100MPa(室温)
【标准号】:BSEN3724-2004
【标准状态】:现行
【国别】:英国
【发布日期】:2004-12-16
【实施或试行日期】:2004-12-16
【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】:尺寸;航空运输;细杆;防护覆层;设计;航空航天运输;十二角螺钉;钛合金;十二角头;覆层;钛;合金;紧固件;螺钉;材料;规范(验收);特性;航天运输;公差(测量);精整
【英文主题词】:Aerospacetransport;Airtransport;Alloys;Ambienttemperatures;Bihexagonalheads;Bihexagonalscrews;Characteristics;Coatings;Design;Dimensions;Fasteners;Finishes;Materials;Multilingual;Properties;Protectivecoatings;Relievedshanks;Screws(bolts);Spacetransport;Specification(approval);Strengthclass;Threads;Titanium;Titaniumalloys;Tolerances(measurement)
【摘要】:ThisstandardspecifiesthecharacteristicsofdoublehexagonheadedboltswithrelievedshankandlongthreadinTI-P64001,MoS2coated,foraerospaceapplications.Strengthclass:1100MPanote:1)Minimumtensilestrengthofthematerialatambienttemperature
【中国标准分类号】:V20
【国际标准分类号】:49_030_20
【页数】:12P.;A4
【正文语种】:英语


【英文标准名称】:Acoustics-Determinationofsoundpowerlevelsofnoisesourcesusingsoundpressure-Comparisonmethodinsitu
【原文标准名称】:声学.用声压测定噪声源的声级.现场比对法
【标准号】:BSENISO3747-2009
【标准状态】:作废
【国别】:英国
【发布日期】:2010-04-30
【实施或试行日期】:2010-04-30
【发布单位】:英国标准学会(GB-BSI)
【起草单位】:BSI
【标准类型】:()
【标准水平】:()
【中文主题词】:
【英文主题词】:Acousticmeasurement;Acoustictesting;Acoustics;Comparison;Comparisonmethods;Definitions;Determination;Ergonomics;Insitu;Inspection;Machinenoise;Machines;Measuringaccuracy;Measuringincertainity;Methods;Noise;Noise(environmental);Noiselevels;Noisemeasurements;Noisesources;Operatingconditions;Precision;Safety;Safetyofmachinery;Sonictesting;Soundlevel;Soundlevels;Soundpressure;Soundsources;Specification(approval);Testing;Use
【摘要】:1.1ThisInternationalStandardspecifiesamethodfordeterminingthesoundpowerlevelsofsoundsourcesinsitu,especiallyifnon-movable.Acomparisonmethodisusedandallmeasurementsarecarriedoutinoctavebands.Themeasurementuncertaintydependsonthetestenvironment.Themeasurementuncertaintyisevaluatedbycomparingwithanindicatordescribingthespatialsounddistribution.Theaccuracywilleitherbethatofanengineeringmethodorasurveymethod.Thesoundpowerlevelofthesourceundertestiscalculatedfromthemeasuredvaluesofthesoundpressurelevelsproducedatspecifiedmeasurementpointsbythesourceandbyareferencesoundsource,respectively.Thesoundpowerleveliscalculatedusingthecalibratedvaluesofthereferencesoundsourceandthedifferencesbetweenthevaluesobtainedwiththesourceundertestandthoseofthereferencesoundsource.Allcalculationsarecarriedoutinoctavebands,fromwhichtheA-weightedsoundpowerlevelisdetermined.1.2ThisInternationalStandardisapplicabletoallkindsoftestenvironmentswhicharetobefoundoutsidealaboratoryenvironment,providedthatthebackgroundnoiselevelissufficientlylowandthesoundpressurelevelatthemicrophonepositionsdependsmainlyonreflectionsfromtheroomsurfaces.1.3ThisInternationalStandardisprimarilyapplicabletosourceswhichradiatebroad-bandnoise.Itmay,however,alsobeusedforsourceswhichradiatenarrow-bandnoiseordiscretetones,althoughthemeasurementuncertaintymightthenbecomelargerthanstatedherein.
【中国标准分类号】:Z32
【国际标准分类号】:17_140_01
【页数】:30P.;A4
【正文语种】:英语