BS 4087-1989 电话和电报用包铜钢导线规范
时间:2024-05-22 05:04:25 来源: 标准资料网 作者：标准资料网 阅读：8645
【英文标准名称】:Specificationforcopper-coveredsteelwirefortelephoneandtelegraphpurposes
【原文标准名称】:电话和电报用包铜钢导线规范
【标准号】:BS4087-1989
【标准状态】:现行
【国别】:英国
【发布日期】:1989-08-31
【实施或试行日期】:1989-08-31
【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】:层覆材料;电阻;验收检验;电报线路;电报设备;电阻率;电线;钢;电话线路;抗拉强度;沾污试验;重量;金属覆层;断裂荷载;直径;尺寸公差;外观检查(试验);作标记;厚度;等级(质量);铜;电话设备;金属线;包装
【英文主题词】:Acceptanceinspection;Breakingload;Coatedmaterials;Copper;Diameter;Dimensionaltolerances;Electricwires;Electricalresistance;Electricalresistivity;Grades(quality);Marking;Metalcoatings;Packaging;Staintests;Steels;Telegraphequipment;Telegraphlines;Telephoneequipment;Telephonelines;Tensilestrength;Thickness;Visualinspection(testing);Weight(mass);Wires
【摘要】:Mechanicalandelectricalpropertiesofcopper-coveredsteelwirewithtwogradesofconductivityandthreeoftensilestrengthtogetherwithsizetolerancesforarangeofwiresizes.Metricunits.
【中国标准分类号】:K12
【国际标准分类号】:29_060_10
【页数】:10P;A4
【正文语种】:英语
【英文标准名称】:StandardTestMethodsforElasticityorToughnessofVarnishes
【原文标准名称】:清漆弹性或韧性的试验方法
【标准号】:ASTMD1642-1993
【标准状态】:作废
【国别】:
【发布日期】:1993
【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】:D01.33
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:涂料;涂层;韧性;涂漆;试验;清漆;弹性(流体)
【英文主题词】:Elasticity;Linseedoil;Pentaerythritol;Reducedvarnish;Resinreduction;Run-Kaurireduction;Toughness;Varnishes;elasticity/toughness-varnishes,test;NumberCode87.040(Paintsandvarnishes)
【摘要】:1.1Thesetestmethodscoverthedeterminationofelasticityortoughnessofanyvarnishwhichismisciblewiththediluentsspecified,undertheconditionsofthetest.1.2Thisstandarddoesnotpurporttoaddressallofthesafetyproblems
【中国标准分类号】:G51
【国际标准分类号】:87_040
【页数】:3P.;A4
【正文语种】:
【英文标准名称】:StandardPracticeforCorrectionofUnitWeightandWaterContentforSoilsContainingOversizeParticles
【原文标准名称】:含有超大颗粒土壤的单位重量和含水量的修正标准实施规程
【标准号】:ASTMD4718-1987(2007)
【标准状态】:现行
【国别】:
【发布日期】:1987
【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】:D18.03
【标准类型】:(Practice)
【标准水平】:()
【中文主题词】:颗粒;含水量;施工材料;修正;建筑;土壤;工艺;重量
【英文主题词】:oversizeparticles;unitweight;watercontent
【摘要】:CompactiontestsonsoilsperformedinaccordancewithTestMethodsD698,D1557,andD4253placelimitationsonthemaximumsizeofparticlesthatmaybeusedinthetest.Ifasoilcontainscobblesorgravel,orboth,testoptionsmaybeselectedwhichresultinparticlesretainedonaspecificsievebeingdiscarded(forexampletheNo.4(4.75-mm)orthex00BE;-in.(19-mm)orotherappropriatesize),andthetestperformedonthefinerfraction.Theunitweightx2013;watercontentrelationsdeterminedbythetestsreflectthecharacteristicsoftheactualmaterialtested,andnotthecharacteristicsofthetotalsoilmaterialfromwhichthetestspecimenwasobtained.Itiscommonengineeringpracticetouselaboratorycompactiontestsforthedesign,specification,andconstructioncontrolofsoilsusedinearthconstruction.Ifasoilusedinconstructioncontainslargeparticles,andonlythefinerfractionisusedforlaboratorytests,somemethodofcorrectingthelaboratorytestresultstoreflectthecharacteristicsofthetotalsoilisneeded.Thispracticeprovidesamathematicalequationforcorrectingtheunitweightandwatercontentofthetestedfinerfractionofasoil,todeterminetheunitweightandwatercontentofthetotalsoil.Similarly,thispracticeprovidesameansforcorrectingtheunitweightandwatercontentoffieldcompactedsamplesofthetotalsoil,sothatvaluescanbecomparedwiththoseforalaboratorycompactedfinerfraction.Note18212;Whenthispracticeisusedforconstructioncontrol,theusingagencyshouldspecifywhetherthemaximumunitweightvalueusedforreferenceistheunitweightincludingoversizefractionortheunitweightofthefinerfraction.Calculatedvaluesofpercentcompactionbasedonthiscorrectionpracticewillvarydependingonwhichunitweightvalueisusedforreference.1.1Thispracticepresentsaprocedureforcalculatingtheunitweightsandwatercontentsofsoilscontainingoversizeparticleswhenthedataareknownforthesoilfractionwiththeoversizeparticlesremoved.1.2Thepracticealsocanbeusedtocalculatetheunitweightsandwatercontentsofsoilfractionswhenthedataareknownforthetotalsoilsamplecontainingoversizeparticles.1.3Thispracticeisbasedontestsperformedonsoilsandsoil-rockmixturesinwhichtheportionconsideredoversizeisthatfractionofthematerialretainedontheNo.4sieve.Basedonthesetests,thispracticeisapplicabletosoilsandsoil-rockmixturesinwhichupto40%ofthematerialisretainedontheNo.4sieve.Thepracticealsoisconsideredvalidwhentheoversizefractionisthatportionretainedonsomeothersieve,suchasthe3/4-in.sieve,butthelimitingpercentageofoversizeparticlesforwhichthecorrectionisvalidmaybelower.However,thepracticeisconsideredvalidformaterialshavingupto30%oversizeparticleswhentheoversizefractionisthatportionretainedonthe3/4-in.sieve.1.4Thefactorcontrollingthemaximumpermissiblepercentageofoversizeparticlesiswhetherinterferencebetweentheoversizeparticlesaffectstheunitweightofthefinerfraction.Forsomegradations,thisinterferencemaybegintooccuratlowerpercentagesofoversizeparticles,sothelimitingpercentagemustbelowerforthesematerialstoavoidinaccuraciesinthecomputedcorrection.Thepersonoragencyusingthispracticeshalldeterminewhetheralowerpercentageistobeused.1.5Thispracticemaybeappliedtosoilswithanypercentageofoversizeparticlessubjecttothelimitationsgivenin1.4and.However,thecorrectionmaynotbeofpracticalsignificanceforsoilswithonlysmallperc......
【中国标准分类号】:Z18
【国际标准分类号】:93_020
【页数】:3P.;A4
【正文语种】: