IEC/TR 60268-13-1985 音响系统设备.第13部分:扬声器的收听试验
时间:2024-04-29 11:39:48 来源: 标准资料网 作者：标准资料网 阅读：8924
【英文标准名称】:Soundsystemequipment.Part13:Listeningtestsonloudspeakers
【原文标准名称】:音响系统设备.第13部分:扬声器的收听试验
【标准号】:IEC/TR60268-13-1985
【标准状态】:作废
【国别】:国际
【发布日期】:1985
【实施或试行日期】:
【发布单位】:国际电工委员会(IEC)
【起草单位】:IEC/SC100C
【标准类型】:()
【标准水平】:()
【中文主题词】:试验;电气设备;电气工程;电声器件;公共寻址系统;扬声器;声传输;传输装置;监听试验;传输系统
【英文主题词】:acoustoelectricdevices;soundtransmission;loudspeakers;electricalequipment;electricalengineering;testing;transmissiondevices;transmissionsystems;listeningtests;public-addresssystems
【摘要】:
【中国标准分类号】:M72
【国际标准分类号】:33_160_50
【页数】:71P;A4
【正文语种】:英语
【英文标准名称】:StandardTestMethodforRelativeExtensionalViscosityofAgriculturalSprayTankMixes
【原文标准名称】:农用喷雾箱混合料的相对拉伸粘度的标准试验方法
【标准号】:ASTME2408-2004
【标准状态】:现行
【国别】:
【发布日期】:2004
【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】:E35.22
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:
【摘要】:Extensionalviscosityisameasureoftheresistanceofaliquidtostretchingforces,suchasthoseoccurringduringthedisruptionofliquidfilmsandtheformationofspraysusedinagricultureandotherpurposesincludingpaintingoperationsormetalworking.ThismethodformeasurementofaScreenFactor,givesarelativevalueforextensionalviscosity,whichmaybeused:4.1.1Tocomparethepotentialfordriftcontrolofdifferentpolymers.4.1.2Tocomparetherelativeextensionalviscositycomponentofdifferentspraytankmixtures.4.1.3Todeterminetheextentofbreakdownofpolymersolutionsusedasdriftcontroladditivesduringtherecirculationofthesolutionsthroughpumpsandscreens.4.1.4TouseasaparameterintheSprayDriftTaskForceModelsfordropletsizeprediction.Itshouldalsobenotedthatmanydriftcontrolpolymersareirreversiblydestroyedduringtherecirculationofspraymixesbypumpingwithhighshearpumpssuchasgearorcentrifugalpumps.Itisadvisabletosubjectthetestmixturetosimilarpumpingregimestosimulatepracticalconditionsbeforecarryingouttheextensionalviscositytest.Measurementsofextensionalviscosityaretheonlypresentlyknownmethodofdeterminingtheextentofthisbreakdownpropertiesofdilutepolymersolutions.Thismethodisintendedtoproducearelativevalueforextensionalviscosity.Thepurposeofthemethodistocomparetheextensionalviscosityproducedbydifferentpolymertypesorconcentrationsofpolymerinspraytankmixes.1.1ThistestmethodcoversthedeterminationoftherelativeextensionalviscosityorScreenFactor(SF)ofdiluteagriculturalspraymixes.1.2Thetestcanbeusedfortankmixescontainingdissolved,emulsifiedordispersedmaterials,ormixtures.1.3Resultsmaybeaffectedbythequalityofthewaterused.Make-upwaterqualityshouldthereforebespecifiedinthepresentationofresults.1.4Propersafetyandhygieneprecautionsmustbetakenwhenworkingwithpesticideformulationstopreventskinoreyecontact,vaporinhalation,andenvironmentalcontamination.Readandfollowallhandlinginstructionsforthespecificformulationandconductthetestinaccordancewithgoodlaboratorypractice.Note1Referencestothedevelopmentofextensionalviscosityfromdissolvedpolymers,extensionalviscosityeffectsonthedropletsizedistributionofsprays,andmeasurementsofscreenfactoronrecirculatedspraymixescontainingpolymersareavailable.1.5Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:B91
【国际标准分类号】:17_060
【页数】:4P.;A4
【正文语种】:
【英文标准名称】:Reliefgroovesforshoulderedcylindricalworkpiecegrinding.Dimensionsandtolerances.
【原文标准名称】:凸肩圆柱形加工件磨光用退刀槽.尺寸与公差
【标准号】:NFE22-120-1992
【标准状态】:作废
【国别】:法国
【发布日期】:1992-04-01
【实施或试行日期】:1992-04-20
【发布单位】:法国标准化协会(FR-AFNOR)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:材料的物理性质;规范;色谱;化学性质;色谱法色谱法色谱法色谱法;香精油;物理性能
【英文主题词】:
【摘要】:
【中国标准分类号】:J51
【国际标准分类号】:21_120_01
【页数】:9P;A4
【正文语种】:其他