BS ISO 18907-2000 成像材料.摄影胶片和相纸.加楔的脆性试验

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【英文标准名称】:Lowvoltagesurgeprotectivedevices-Part21:Surgeprotectivedevicesconnectedtotelecommunicationsandsignallingnetworks;Performancerequirementsandtestingmethods
【原文标准名称】:低压浪涌保护装置第21部分:接到通信和信号网络的浪涌保护装置性能要求和试验方法
【标准号】:IEC61643-21-2000
【标准状态】:现行
【国别】:国际
【发布日期】:2000-09
【实施或试行日期】:
【发布单位】:国际电工委员会(IX-IEC)
【起草单位】:IEC/SC37A
【标准类型】:()
【标准水平】:()
【中文主题词】:电气工程;低压电器;低压电路;过电压保护装置;电涌放电器;规范(验收);性能;试验
【英文主题词】:Circuitnetworks;Definitions;Electricalengineering;Environmentaltesting;Low-voltagecircuit;Low-voltageequipment;Mechanicaltesting;Mission;Operatingconditions;Overvoltageprotection;Performance;Performancerequirements;Signalprocessing;Specification(approval);Surgearresters;Telecommunications;Testing;Testingconditions;Use
【摘要】:ThisInternationalStandardisapplicabletodevicesforsurgeprotectionoftelecommunicationsandsignallingnetworksagainstindirectanddirecteffectsoflightningorothertransientovervoltages.ThepurposeoftheseSPDsistoprotectmodernelectronicequipmentconnectedtotelecommunicationsandsignallingnetworkswithnominalsystemvoltagesupto1000V(r.m.s.)a.c.and1500Vd.c.
【中国标准分类号】:K31
【国际标准分类号】:29_120_50;33_040_30
【页数】:
【正文语种】:英语


【英文标准名称】:StandardPracticeforSurfaceCleaningConcreteforCoating
【原文标准名称】:覆层用表面清洁混凝土的标准规程
【标准号】:ASTMD4258-2005
【标准状态】:现行
【国别】:
【发布日期】:2005
【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】:D33.05
【标准类型】:(Practice)
【标准水平】:()
【中文主题词】:覆层;清洁处理;核能;涂料;涂漆;核技术;表面;工艺
【英文主题词】:concrete;surfacecleaning;surfaceprofile
【摘要】:Surfacecleaningisusedtoprepareconcretesurfacesforapplyingcoatingsintendedforlight-dutyservice.Useofthispracticealoneisnotintendedwhereprotectivesystemswillbeusedforcontinuousorintermittentimmersion,mechanicalloading,orforprotectivesystemsneedingoptimumbondforsatisfactoryperformance(seePracticesD4259andD4260).1.1Thispracticeincludessurfacecleaningofconcretetoremovegrease,dirt,andloosematerialpriortotheapplicationofcoatings.Proceduresincludebroomcleaning,vacuumcleaning,airblastcleaning,watercleaning,detergentwatercleaning,andsteamcleaning.1.2Thispracticeisnotintendedtoalterthesurfaceprofileoftheconcretebuttocleanthesurface.1.3Thisstandardmayinvolvehazardousmaterials,operations,andequipment.Thisstandarddoesnotpurporttoaddressallofthesafetyproblemsassociatedwithitsuse.Itistheresponsibilityofwhoeverusesthisstandardtoconsultandestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.Forspecificprecautions,seeSection5.
【中国标准分类号】:Q72
【国际标准分类号】:91_080_40
【页数】:2P.;A4
【正文语种】: