【英文标准名称】:Sawntimber-Appearancegradingofhardwoods-Part1:Oakandbeech;GermanversionEN975-1:2009+AC:2010
【原文标准名称】:锯成木材.硬木的外观等级.第1部分:橡木和榉木.德文版本EN975-1-2009+AC-2010
【标准号】:DINEN975-1-2011
【标准状态】:现行
【国别】:德国
【发布日期】:2011-08
【实施或试行日期】:
【发布单位】:德国标准化学会(DE-DIN)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:外观;狭板;水青岗木;水青岗(木材);块料;镶边;类别;特征;分类法;定义(术语);名称与符号;尺寸规格;等级(质量);硬木;橡木;工作特性;质量;质量特性;质量情况;接收;锯材;阔叶树锯材;木板条;规范(验收);原木木材;外观检查(测试);木材
【英文主题词】:Appearance;Battens;Beech;Beech(wood);Blockgoods;Bordered;Categories;Characteristics;Classifications;Definitions;Designations;Dimensions;Grades(quality);Hardwoods;Oak(wood);Performancecharacteristics;Quality;Qualitycharacteristics;Qualitycondition;Reception;Sawntimber;Sawntimberofbroadleavedspecies;Slats;Specification(approval);Timberinlogs;Visualinspection(testing);Wood
【摘要】:ThisEuropeanStandardspecifiestherulesdeterminingthequalityofappearancegradedsawntimber.Itdescribesvariousgradesoftemperatehardwoodroughsawtimberandregularizedtimberforwhichitlaysdowndenominationsanddefinitions.Italsogivesrulesforcompositionandacceptanceofbatches.
【中国标准分类号】:B69
【国际标准分类号】:79_040
【页数】:37P.;A4
【正文语种】:英语


【英文标准名称】:Surfacemountingtechnology-Environmentalandendurancetestmethodsforsurfacemountsolderjoint-Cyclicdroptest
【原文标准名称】:表面安装技术.表面安装焊缝的环境和耐久性试验方法.循环跌落试验
【标准号】:BSEN62137-1-3-2009
【标准状态】:现行
【国别】:英国
【发布日期】:2009-03-31
【实施或试行日期】:2009-03-31
【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】:弯曲试验;温度变化;连续性试验;定义;分立器件;跌落试验;耐久性;电气工程;电子工程;电子设备及元件;耐久试验;耐用试验;环境试验;集成电路;寿命;材料试验;工作温度;可靠性;半导体器件;表面安装设备;软钎焊连接;焊接点;表面安装;表面安装装置;温度周期;温度抵抗力;温度变化试验;试验;热循环;耐热冲击能力;耐热冲击强度
【英文主题词】:Bendtesting;Changesoftemperature;Continuitytests;Definitions;Discretedevices;Droptests;Durability;Electricalengineering;Electronicengineering;Electronicequipmentandcomponents;Endurancetesting;Endurancetests;Environmentaltesting;Integratedcircuits;Life(durability);Materialstesting;Operatingtemperatures;Reliability;Semiconductordevices;SMD;Solderedjoints;Solderingpoints;Surfacemounting;Surfacemountingdevices;Temperaturecycles;Temperatureresistant;Testonchangesoftemperature;Testing;Thermalcycling;Thermalshockendurance;Thermalshockresistance
【摘要】:ThetestmethoddescribedinthispartofIEC62137appliestosolderjointsbetweenterminalsofsurfacemountingdevices(SMDs)andlandpatternsonprintedwiringboards(PWBs).Thistestisintendedtoevaluatethestrengthofthesolderjointsoflargersizedmulti-terminalcomponentsandothercomponentsindevices(e.g.handheldmobiledevices)intheeventthatthedeviceisdropped.Thepropertiesofthesolderjoints(e.g.solderalloy,substrate,mounteddeviceordesign,etc.)areevaluatedtoassistinimprovingthestrengthofthesolderjoints.
【中国标准分类号】:L10
【国际标准分类号】:
【页数】:28P;A4
【正文语种】:英语