UL 786 BULLETIN-2007 UL安全标准.钥匙锁式保险柜(KL类)

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【英文标准名称】:DraftStandardforLocalandMetropolitanAreaNetworks—VirtualBridgedLocalAreaNetworks—Revision
【原文标准名称】:局域网和城域网用标准草案.虚拟桥接局域网.修订本
【标准号】:ANSIP802.1Q/D5.0-2005
【标准状态】:现行
【国别】:美国
【发布日期】:2005-09-12
【实施或试行日期】:2005-09-12
【发布单位】:美国国家标准学会(US-ANSI)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:
【英文主题词】:
【摘要】:ForthepurposeofcompatibleinterconnectionofinformationtechnologyequipmentusingtheIEEE802MACServicesupportedbyinterconnectedIEEE802standardLANsusingdifferentoridenticalmediaaccesscontrolmethods,thisstandardspecifiestheoperationofMACBridgesthatsupportVirtualLANs(VLANs).Tothisendita)PositionsthesupportofVLANswithinanarchitecturaldescriptionoftheMACSublayer;b)DefinestheprinciplesofoperationoftheVLAN-awareBridgeintermsofthesupportandpreservationoftheMACService,andthemaintenanceofQualityofService;c)SpecifiesanEnhancedInternalSublayerServiceprovidedtotheMediaAccessIndependentfunctionsthatprovideframerelayinaVLAN-awareBridge;d)EstablishestheprinciplesandamodelofVirtualBridgedLocalAreaNetworkoperation;e)IdentifiesthefunctionstobeperformedbyVLAN-awareBridges,andprovidesanarchitecturalmodeloftheoperationofaBridgeintermsofProcessesandEntitiesthatprovidethosefunctions;f)SpecifiesaframeformatthatallowsaVLANIdentifier(VID)andpriorityinformationtobecarriedbyVLANtaggeduserdataframes;g)SpecifiestherulesthatgoverntheadditionorremovalofVLANtagstoandfromuserdataframes;h)SpecifiestherulesthatgoverntheabilitytocarryuserdataineitherCanonicalformatorNoncanonicalformatinVLAN-taggedframes;NOTE—ThemeaningsofthetermsCanonicalformatandNon-canonicalformatarediscussedinIEEEStd802.i)EstablishestherequirementsforautomaticconfigurationofVLANtopology;j)EstablishestherequirementsforVLAN-awareBridgeManagementinaVirtualBridgedLocalAreaNetwork,identifyingmanagedobjectsanddefiningmanagementoperations;k)DefinestheoperationoftheMultipleSpanningTreealgorithmandprotocol(MSTP);l)DescribestheprotocolsandproceduresnecessarytosupportinteroperationbetweenMSTandSSTBridgesinthesameVirtualBridgedLocalAreaNetworks;m)Specifiestherequirementstobesatisfiedbyequipmentclaimingconformancetothisstandard.
【中国标准分类号】:M11
【国际标准分类号】:
【页数】:300P.;A4
【正文语种】:英语


【英文标准名称】:Plastics-Determinationofthetime-temperaturelimitsafterprolongedexposuretoheat
【原文标准名称】:塑料.长期暴露于热作用后时间和温度极限值的测定
【标准号】:BSENISO2578-1993
【标准状态】:现行
【国别】:英国
【发布日期】:1993-12-15
【实施或试行日期】:1993-12-15
【发布单位】:英国标准学会(GB-BSI)
【起草单位】:BSI
【标准类型】:()
【标准水平】:()
【中文主题词】:老化(材料);定义;定义(术语);测定;耐久试验;曝光时间;热学;热老化试验;高温试验;长期性状;塑料;温度;痕量元素分析;热稳定性;热应力;热试验
【英文主题词】:Ageing(materials);Definition;Definitions;Determination;Endurancetesting;Exposuretime;Heat;Heatageingtests;High-temperaturetesting;Long-timebehaviour;Plastics;Temperature;Testing;Thermalstability;Thermalstress;Thermaltest
【摘要】:Specifiestheprinciplesandproceduresforevaluatingthethermalendurancepropertiesofplasticsexposedtoelevatedtemperatureforlongperiods.Thestudyofthethermalageingisbasedsolelyonthechangeincertainpropertiesresultingfromaperiodofexposuretoelevatedtemperature.Thepropertiesstudiedarealwaysmeasuredafterthetemperaturehasreturnedtoambient.
【中国标准分类号】:G31
【国际标准分类号】:83_080_01
【页数】:24P.;A4
【正文语种】:英语