NF E38-423-2005 热交换器.湿冷却塔热性能的测量和评价方法
作者:标准资料网 时间:2024-05-06 19:10:52 浏览:8687
来源:标准资料网
【英文标准名称】:Heatexchangers-Methodofmeasurementandevaluationofthermalperformancesofwetcoolingtowers.
【原文标准名称】:热交换器.湿冷却塔热性能的测量和评价方法
【标准号】:NFE38-423-2005
【标准状态】:现行
【国别】:法国
【发布日期】:2005-10-01
【实施或试行日期】:2005-10-20
【发布单位】:法国标准化协会(AFNOR)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:
【英文主题词】:
【摘要】:
【中国标准分类号】:J75
【国际标准分类号】:27_060_30;27_200
【页数】:57P;A4
【正文语种】:其他
【英文标准名称】:InstrumentBallBearings-InchDesign
【原文标准名称】:测量仪表用滚珠轴承.英制
【标准号】:ANSI/ABMA12.2-1992
【标准状态】:现行
【国别】:美国
【发布日期】:1992
【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】:精密度;滚珠轴承;轴承
【英文主题词】:Ballbearings;Balls;Bearings;Design;Instruments;Precision;Rollingbearings
【摘要】:Coversthecharacteristicsthatdefinetherequirementsofprecisionandsuper-precisioninstrumentballbearings.Itestablishestheirboundarydimensions,tolerances,internalclearances,andclassificationforselectiveassembly.Therecommendedpracticesforgauging,frictionaltorquedetermination,loadratingdetermination,andoperationallifepredictionanyieldratelimitationareprovided.AllcomponentscoveredbythisstandardaredesignedtoU.S.Customary(inch)dimensionsandarepresentedinPart2ofthetablesprovided.TheequivalentS.I.(metric)dimensionsshowninPart1ofthetablesareprovidedfortheconvenienceofthoseusingthatsystem.
【中国标准分类号】:J11
【国际标准分类号】:21_100_20
【页数】:
【正文语种】:英语
【英文标准名称】:StandardGuideforConductingSexualReproductionTestswithSeaweeds
【原文标准名称】:海草性繁殖试验的标准指南
【标准号】:ASTME1498-1992(2004)
【标准状态】:现行
【国别】:
【发布日期】:1992
【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】:E47.01
【标准类型】:(Guide)
【标准水平】:()
【中文主题词】:植物的耕种;检验总量;繁殖;生物学
【英文主题词】:algae;Champia;microalgae;plants;seaweed;toxicitytest
【摘要】:Seaweedshavehistoricallybeenconsideredlessusefulfortoxicitytestingthanmicroalgae(1),4andmicroalgaeareoftenconsideredlesssensitivethanaquaticanimals(2).Suchconclusionsconcerningseaweedinsensitivitywerebasedondataforonlyafewhardyspeciesandbasedgenerallyonvegetativegrowthofadultstagesastheprimaryendpoint.Thesensitivityofseaweedsincreaseswheneffectsonsexualreproductionareassessed.ThishasbeenshownforChampiaparvula(3),aswellasforthebrownseaweeds,Fucusedentatus,Laminariasaccharina,andMacrocystispyrifera(4).Theresultsofsexualreproductiontestswithseaweedsmightbeusefulforpredictingthelong-termeffectslikelytooccuronseaweedsinfieldsituationsduetoexposureundercomparableconditions.Theresultsofsexualreproductiontestswithseaweedsmightbeusedtocomparethechronictoxicitiesofdifferentmaterials,andalsotostudytheeffectsofvariousenvironmentalfactorsontheresultsofsuchtests.Theresultsofsexualreproductiontestswithseaweedsmightbeanimportantconsiderationwhenassessingthehazardsofmaterialstoaquaticorganismsorwhenderivingwaterqualitycriteriaforsaltwaterorganisms(5).Theresultsofsexualreproductiontestswithseaweedswilldependonthetemperature,compositionofdilutionwater,conditionoftestorganisms,andotherfactorssuchaslightandmedia.1.1Thisguidecoversproceduresforobtaininglaboratorydataconcerningtheadverseeffectsofatestmaterialaddedtodilutionwateronsexualreproductionbyseaweeds.Theexposuredurationisspeciesdependentandisfollowedbyaperiodofdevelopmenttoallowtheevidenceofsexualreproductiontoappear.Thereisnoexposuretotoxicantsduringthedevelopmentperiod.Thisrestrictsthetestsprimarilytotheeventssurroundingeggfertilization,anditminimizesanytimelageffectsondevelopmentthatmightinterferewithcorrectenumerationofthenumberofsexualeventsthatoccurred.Theseprocedureswillprobablybeusefulforconductingsexualreproductiontoxicitytestswithavarietyofspeciesofseaweeds,althoughmodificationsmightbenecessary.1.2Othermodificationsoftheseproceduresmightbejustifiedbyspecialneedsorcircumstances.Althoughusingappropriateproceduresismoreimportantthanfollowingprescribedprocedures,theresultsoftestsconductedusingunusualproceduresarenotlikelytobecomparabletothoseofmanyothertests.Comparisonoftheresultsobtainedusingmodifiedandunmodifiedversionsoftheseproceduresmightprovideusefulinformationconcerningnewconceptsandproceduresforconductingsexualreproductiontestswithseaweeds.1.3Theseproceduresareapplicabletomostchemicals,eitherindividuallyorinformulations,commercialproducts,andknownmixturesorwholeeffluents,aswellasforuseintestingsurfacewaters.Withappropriatemodifications,theseprocedurescanbeusedtostudytheeffectsoftemperature,dissolvedoxygen,pH,andsuchmaterialsasleachates,oils,particulatematter,andsediments.1.4ThevaluesstatedinSIunitsaretoberegardedasthestandard.1.5Thisguideisarrangedasfollows:1.6Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.Forspecifichazardsstatements,seeandSection7.
【中国标准分类号】:B05
【国际标准分类号】:65_020_20
【页数】:12P.;A4
【正文语种】:
