GB/T 2889.2-2020.Plain bearings-Terms, definitions , classification and symbols-Part 2:Friction and wear. 1范围 GB/T 2889的本部分界定了与滑动轴承摩擦和磨损相关的最常用的术语、定义和分

GB/T 5226.34-2020.Electrical safety of machinery-Electrical equipment of machines一Part 34: Requirements for machine tools. 1范围 GB/T 5226的本部分规定了机床电气设备及

GB/T 2481.2-2020.Bonded abrasives-Determination and designation of grain size distribution-Part 2 :Microgrits. 1范围 GB/T 2481的本部分规定了刚玉、碳化硅微粉F230~ F2000

GB/T 38621-2020.Transient thermal test method for light emitting diode modules. 1范围 GB/T 38621规定了由单个、多个发光二极管(LED)芯片或器件组成的LED模块热特性瞬态测试方法原理、一般要求、测试步骤、结果

GB/T 38762.3-2020.Geometrical product specifications (GPS)一Dimensional tolerancing-Part 3: Angular sizes. 1范围 GB/T 38762.3建立了角度尺寸的缺省规范操作集,并为下列角度尺寸要素定义

GB/T 38762.2-2020.Geometrical product specifications(GPS) 一Dimensional tolerancing一Part 2:Dimensions other than linear or angular sizes. 1范围 GB/T 3876

GB/T 24637.4-2020.Geometrical product specifications (GPS)-General concepts-Part 4:Geometrical characteristics for quantifying GPS deviations. 1范围 GB/

GB/T 2889.3-2020.Plain bearings-Terms， definitions , classification and symbols-Part 3:Lubrication. 1范围 GB/T 2889的本部分界定了与滑动轴承润滑相关的最常用的术语、定义和分类。 GB/T 2

GB/T 38777-2020.Technical requirements and methods of measurement for digital terrestrial television external receiving module. 1范围 GB/T 38777规定了支持GB

GB/T 38001.62-2020.Flexible display devices-Part 6-2: Environmental testing methods. 1范围 GB/T 38001的本部分给出了在使用、贮存和运输的规定条件下,评价包括液晶显示(LCD)、电子纸(EPD)和有机发光二

GB/Z 38649-2020.Information security technology-Guide of information security assurance framework for smartcities. 1范围 GB/Z 38649提供了智慧城市建设全过程的信息安全保障指导

GB/T 38637.1-2020.Internet of things-Access of sensing and controlling device-Part 1: General requirements. 1范围 GB/T 38637的本部分规定了物联网系统中感知控制设备接人的接人要求、应