GB/T 38754-2020.Technical requirements for IPTV media delivery system-Streaming media services. 1范围 GB/T 38754规定了IPTV媒体交付系统提供的流媒体服务的类型、流媒体内容编码及文件格式要求、

GB/T 38952-2020.Non-destructive testing-Testing method for measuring residual stress using bulk wave. 1范围 GB/T 38952规定了残余应力超声体波检测的术语和定义、人员要求、检测要点、检测系统

GB/T 38944-2020.Non-destructive testing-Testing method of small-angle neutron scattering. 1范围 GB/T 38944规定了基于反应堆中子源的中子小角散射试验检测样品内部第二相粒子(微孔洞、析出相、填料等)尺寸

GB/T 38844-2020.Smart factory-General specification for time synchronization ,time management and test in industry automation system. 1范围 GB/T 38844规定

GB/T 38820-2020.Irradiation-resistant and heat-resistant steels. 1范围 GB/T 38820规定了抗辐照耐热钢的术语和定义、订货内容、尺寸、外形、重量、技术要求、试验方法、检验规则、包装、标志和质量证明书。 GB/T 38820适用于

GB/T 20671.5-2020.Classification system and test methods for nonmetallic gasket materials-Part 5 : Standard test method for creep relaxation of gasket

GB/T 20671.6-2020.Classification system and test methods for nonmetallic gasket materials-Part 6: Standard test method for adhesion of gasket material

GB/T 38812.3-2020.Direct reduced iron-Determination of silicon, manganese，phosphorus , vanadium,titanium, copper，aluminum, arsenic ，magnesium, calcium

GB/T 38913-2020.Test methods for hydride orientation fraction of nuclear grade zirconium and zirconium alloy tubes. 1范围 GB/T 38913规定了核级锆及锆合金管材氢化物取向因子检

GB/T 38912-2020.Test method for closed-end burst of zirconium tubes at room temperature. 1范围 GB/T 38912规定了锆管在室温10°C~35°C条件下闭端内压爆破试验的方法。 GB/T 38912适用于锆