BS 5550 SubSec.5.4.6-1988 电影摄影技术.第5部分:多种胶片宽度的通用部分.第4节:声音.第6小节:在8mmS型、16mm、35mm可变面摄影录音的信噪比的测量方法

上一篇: BS 5550 SubSec.5.12.2-1988 电影摄影技术.第5部分:多种胶片宽度的通用部分.第12节:杂项.第2小节:电影胶片和磁性材料交换用磁片盒标签的最少信息规范
下一篇: BS 4826 Pt.1-1988 全满装运输包装.第1部分:试验部位的识别分法

【英文标准名称】:StandardTestMethodforMicronaireReadingofCottonFibers
【原文标准名称】:棉纤维的马克隆尼读数的标准试验方法
【标准号】:ASTMD1448-2011
【标准状态】:现行
【国别】:
【发布日期】:2011
【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】:D13.11
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:棉花;细度;马克隆尼气流式纤维细度测试仪读数;气流阻力;棉布/纤维;成熟度-棉纤维;纱线支数
【英文主题词】:cotton;fineness;micronairereading;Airflowresistance;Cottonfabrics/fibers;Maturity--cottonfibers;Yarnnumber
【摘要】:Thistestmethodisconsideredsatisfactoryforacceptancetestingwhenthelevelsofthelaboratoriesarecontrolledbytheuseofthesamereferencestandardcottonsamplesbecausethecurrentestimatesofbetween-laboratoryprecisionareacceptableundertheseconditions.Iftherearedifferencesofpracticalsignificancebetweenreportedtestresultsfortwolaboratories(ormore),comparativetestsshouldbeperformedtodetermineifthereisastatisticalbiasbetweenthem,usingcompetentstatisticalassistance.Asaminimum,ensurethetestsamplestobeusedareashomogeneousaspossible,aredrawnfromthematerialfromwhichthedisparatetestresultswereobtained,andarerandomlyassignedinequalnumberstoeachlaboratoryfortesting.Thetestfromthetwolaboratoriesshouldbecomparedusingastatisticaltestforunpaireddata,ataprobabilitylevelchosenpriortothetestingseries.Ifabiasisfound,eitheritscausemustbefoundandcorrected,orfuturetestresultsforthatmaterialmustbeadjustedinconsiderationoftheknownbias.Themicronairereadingofcottonfibersisafunctionofbothfinenessandmaturityandisrelatedtomillprocessingperformanceandtothequalityoftheendproducts.Factorscorrelatedwithmicronairereadingincludecleaningefficiency,neppiness,andthestrengthanduniformityoftheyarn.Note28212;Amodificationofthistestmethodisusedincommercialtradingtoselectbaleswhichwillconformtocontractguaranteesforspecifiedmicronairereadings(refertoD5867).Forthispurpose,itisusualpracticetotestonlyonespecimenpersample.1.1Thistestmethodcoversthedeterminationofthemicronairereadingofloosecottonfibersbymeasuringtheresistanceofaspecificmass(plug)ofcottonfiberstoairflowunderprescribedconditions.Note18212;Forothermethodsfordeterminingthefinenessoffibersbasedontheair-flowprinciple,refertoTestMethodD1449,TestMethodforSpecificAreaandImmaturityRatioofCottonFibers(ArealometerMethod),andtoTestMethodD1282,TestMethodforResistancetoAirFlowasanIndicationofAverageFiberDiameterofWoolTop,CardSliver,andScouredWool.1.2Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:W10
【国际标准分类号】:59_060_10
【页数】:3P.;A4
【正文语种】:


【英文标准名称】:Specificationforprestressedconcretepressurepipes(includingfittings)
【原文标准名称】:预应力混凝土承压管(包括配件)规范
【标准号】:BS4625-1970
【标准状态】:作废
【国别】:英国
【发布日期】:1970-07-31
【实施或试行日期】:1970-07-31
【发布单位】:英国标准学会(BSI)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:管;设计;优先尺寸;污水;液体静压力;尺寸;尺寸;压力试验;压缩试验;混凝土;量值;破碎试验;预应力混凝土;水;压力管;管道配件
【英文主题词】:crushingtests;preferredsizes;hydrostaticpressure;dimensions;water;sewage;pressurepipes;design;compressiontesting;pipes;prestressedconcrete;pressuretesting;size;concretes;pipefittings
【摘要】:
【中国标准分类号】:Q14
【国际标准分类号】:23_040_50
【页数】:24P;A4
【正文语种】:英语