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【英文标准名称】:Screws,100°countersunknormalhead,offsetcruciformrecess,closetolerancenormalshank,shortthread,inheatandcorrosionresistingsteel,passivated-Classification:1100MPa(atambienttemperature)/425°C
【原文标准名称】:钝化耐热及耐腐蚀钢制短螺纹紧公差标准柄翼型十字槽100°标准埋头螺钉.等级:1100MPa(室温)/425℃
【标准号】:BSEN3543-1997
【标准状态】:现行
【国别】:英国
【发布日期】:1997-06-15
【实施或试行日期】:1997-06-15
【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】:作标记;尺寸;螺钉;温度;阳极氧化;外螺纹紧固件;抗拉强度;航天器部件;螺纹紧固件;耐腐蚀钢;名称与符号;质量(物质);螺纹;钢;螺栓;十字头紧固件;钝化;凹槽头紧固件;角(几何学);长度;粗糙度(表面);紧固件;飞行器部件;耐热材料;形状
【英文主题词】:Aerospacetransport;Airtransport;Aircraft;Corrosion-resistant;Corrosion-resistantsteels;Countersunkheadscrews;Cruciform-headfasteners;Designations;Dimensionaltolerances;Dimensions;Fasteners;Fittingbolts;Heat-resistantmaterials;Hightemperature;Marking;Mass;Materials;Multilingual;Passivated;Properties;Recesses;Screws(bolts);Spacetransport;Specification(approval);Steels;Surfacetreatment;Threads;Torq-setrecesses
【摘要】:Thisstandardspecifiesthecharacteristicsofscrews,100°countersunknormalhead,offsetcruciformrecess,closetolerancenormalshank,shortthread,inheatandcorrosionresistingsteel,passivated.Classification:1100MPa/425℃note:1)Minimumtensilestrengthofthematerialatambienttemperature2)Maximumtemperaturethatthescrewcanwithstandwithoutcontinuouschangeinitsoriginalcharacteristics,afterreturntoambienttemperature.Themaximumtemperatureisdeterminedbythematerial.
【中国标准分类号】:V20
【国际标准分类号】:49_030_20
【页数】:14P.;A4
【正文语种】:英语


【英文标准名称】:Acoustics-Determinationofsoundpowerlevelsofnoisesourcesusingsoundpressure-Precisionmethodsforreverberationrooms
【原文标准名称】:声学.用声压测定噪声源的声级.混响室精确法
【标准号】:ANSI/ISO3741-1999
【标准状态】:作废
【国别】:美国
【发布日期】:1999
【实施或试行日期】:
【发布单位】:美国国家标准学会(US-ANSI)
【起草单位】:ANSI
【标准类型】:()
【标准水平】:()
【中文主题词】:规范(验收);发出的空气噪声;音量;数学计算;混响;混响室;测量;声学;声学试验;测量技术;声学测量;混响室法;声源;响度;测定;声级;噪声(环境的);声强;机器;测量仪器;定义;试验;噪声测量
【英文主题词】:Acousticmeasurement;Acoustictesting;Acoustics;Airbornenoiseemitted;Definition;Definitions;Determination;Loudnesslevel;Machines;Mathematicalcalculations;Measurement;Measuringinstruments;Measuringtechniques;Noise(environmental);Noisemeasurements;Reverberation;Reverberationroommethod;Reverberationrooms;Soundintensity;Soundlevel;Soundlevels;Soundsources;Specification(approval);Testing;Tests;Volume(sound)
【摘要】:Specifiesadirectmethodandacomparisonmethodfordeterminingthesoundpowerlevelthatwouldbeproducedbyasourceoperatinginanenvironmentatstandardmeteorologicalconditionscorrespondingtoacharacteristicimpedanceofpc=400N-s/m3(wherepisthedensityofairandcisthespeedofsound).Specifiestestroomrequirements,sourcelocationandgeneralrulesforoperatingconditions,instrumentationandtechniquesforobtaininganestimateofmean-squaresoundpressurelevels.
【中国标准分类号】:Z32
【国际标准分类号】:17_140_01
【页数】:
【正文语种】:英语