NF X35-107-2-1997 机器的安全性.人体测量.第2部分:通道开口所需尺寸的测定原则

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【英文标准名称】:StandardPracticeforStitchesandSeams
【原文标准名称】:针角和缝合的标准实施规程
【标准号】:ASTMD6193-2009
【标准状态】:现行
【国别】:美国
【发布日期】:2009
【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】:D13.54
【标准类型】:(Practice)
【标准水平】:()
【中文主题词】:
【英文主题词】:seams;stitches;textiles
【摘要】:Seamengineering,thedeterminationofthebeststitchtype,seamconfiguration,andthreadtypewhichshouldbeusedforaparticularassembly,requiresathoroughknowledgeofmanyvariables.Theimproperselectionofanyonecomponentcanresultinfailureofthesewnjunction,andultimatelyfailureoftheproductmanufactured.GeneralCharacteristics8212;Thecharacteristicsofaproperlyconstructedsewnseamarestrength,elasticity,durability,security,andappearance.Thesecharacteristicsmustbebalancedwiththepropertiesofthematerialtobejoinedtoformtheoptimumsewnseam.Theenduseoftheitemwillgoverntherelativeimportanceofthesecharacteristics.Theselectionoftheseamtypeandstitchtypeshouldbebasedupontheseconsiderations.Strength8212;Theseamefficiencyofthesewnseamshouldbeashighaspossible.Thiswillproducesewnseamstrengthwithabalancedconstructionthatwillwithstandtheforcesencounteredintheuseofthesewnitem.Theelementsaffectingthestrengthofasewnseamare:Fabrictypeandstrength,Seamtype,Stitchtype,Stitchdensity(spi),Threadtension,andThreadstrength.Elasticity8212;Theelasticityofasewnseamshouldbeslightlygreaterthanthatofthematerialwhichitjoins.Thiswillenablethematerialtosupportitsshareoftheforcesencounteredfortheintendedenduseofthesewnitem.Theelasticityofasewnseamdependsupon:Fabrictypeandstrength,Seamtype,Stitchtype,Stitchdensity(spi),Threadtension,andThreadelasticity.Durability8212;Thedurabilityofasewnseamdependslargelyuponitsstrengthrelativetotheelasticityoftheseamandtheelasticityofthematerial.However,inlesselastic,tightlywovenordensematerials,thereisatendencyforthepliestox201C;workx201D;orslideoneachother.Toformadurablesewnseaminthesetypesoffabrics,thethreadsizemustbecarefullychosen.Thestitchdensityalsoneedstobecarefullydeterminedforthematerialsoasnottocauseexcesstensionwhichwillunbalancetheelasticityandcausepuckering.Itisalsoimportanttominimizeabrasionandwearbycontactwithoutsideagenciestopromotedurability.Security8212;Thesecurityofasewnseamdependschieflyuponthestitchtype,spi,anditssusceptibilitytobecomeunraveled.Thestitchmustbewellsettothematerialtopreventsnaggingthatcancauseruptureofthethreadandunravelingofcertainstitchtypes.Appearance8212;Theappearanceofasewnseamgenerallyisgovernedbytheproperrelationshipbetweenthesizeandtypeofthread,thestitchdensity,andthetextureandweightofthefabric.Inadditiontothesegeneralcharacteristics,thetechniqueandskillofthesewingmachineoperatorsalsogoverntheappearanceofthesewnseams.SomeofthefactorswhichwilladverselyaffecttheappearanceareshowninTable1.TABLE1StitchandSeamDefectsStitchDefectsSeamAssemblynbsp;nbsp;nbsp;DefectsLoosestitches
Puckers
【英文标准名称】:Connectorsetsandinterconnectcomponentstobeusedinopticalfibrecommunicationsystems-Productspecifications-Part7-1:TypeLC-PCduplexterminatedonIEC60793-2categoryA1aandA1bmultimodefibre;GermanversionEN50377-7-1:2004
【原文标准名称】:光纤通信系统中使用的连接器组件和互连元件.产品规范.第7-1部分:终接在IEC60793-2A1a和A1b类多模纤维上的LC-PC双工型
【标准号】:DINEN50377-7-1-2004
【标准状态】:现行
【国别】:德国
【发布日期】:2004-10-01
【实施或试行日期】:2004-10-01
【发布单位】:德国标准化学会(DIN)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:工作性能;电插头;插头;电子设备及元件;规范(验收);色码;光波导;光学特性;电气工程;多模纤维;产品标准;成双的;寿命;玻璃纤维电缆;适配器;产品规范;通信系统;电子工程;机械性能;尺寸;作标记;试验;型式;处理触点
【英文主题词】:
【摘要】:ThisEuropeanStandardcontainstheinitial,startoflifedimensional,optical,mechanicalandenvironmentalperformancerequirementswhichaterminatedandassembledmultimoderesilientalignmentsleeveLC-PCduplexconnectorset(plug/adaptor/plug)mustmeetinorderforittobecategorisedasanEuropeanStandardproduct.#,,#
【中国标准分类号】:L23
【国际标准分类号】:33_180_20
【页数】:31P;A4
【正文语种】:德语