GB/T 38658-2020.Guidance for the extension of validity of type tests of AC metal enclosed switchgear and controlgear for rated voltages above 3.6 kV a

GB/T 5137.5-2020.Test methods of safety glazing materials used on road vehicles-Part 5 :Resistant-to-chemical and resistant-to-temperature changes tes

GB/T 17045-2020.Protection against electric shock-Common aspects for installations and equipment. 1范围 GB/T 17045是基础的安全出版物,主要用于技术委员会根据IECGuide104和ISO/I

GB/T 12729.5-2020.Spices and condiments-Determination of extraneous matter content. 1范围 GB/T 12729的本部分规定了测定香辛料和调昧品外来物的物理测定方法. GB/T 12729.5适用于香辛料和调味品外来

GB/T 38704-2020.Frame system of timber supporting curtain wall. 1范围 GB/T 38704规定了建筑木框架幕墙组件的分类和标记、一般规定、要求、试验方法、检验规则、标志、标签和随行文件、包装、运输和贮存。 GB/T 38704适用于以

GB/T 38705-2020.Classification and basic requirements for urban heat supply facilities operation safety information. 1范围 GB/T 38705规定了城镇供热设施运行安全信息的术语和

GB/T 38719-2020.Metallic materials-Tube一 Determination of biaxial stress-strain curve of tube by hydro-bulging test. 1范围 GB/T 38719规定了金属材料管双轴应力-应变曲线液压

GB/T 38727-2020.Biodegradable plastic films and bags for express logistics transportation and delivery. 1范围 GB/T 38727规定了用于物流快递运输、投递用的全生物降解包装膜、袋产品的要求、

GB/T 25156-2020.General specifications and inspection methods of rubber and plastics injection moulding machines. 1范围 GB/T 25156规定了橡胶塑料注射成型机的型号和基本参数、要

GB/T 5137.3-2020.Test methods of safety glazing materials used on road vehicles-Part 3: Radiation，high temperature , humidity , fire and simulated wea

GB/T 38588-2020.In-situ measurements of heat loss of insulating pipes for urban heat-supplying. 1范围 GB/T 38588规定了城镇供热保温管网系统散热损失现场检测方法的术语、定义和符号,测试方法,测试

GB/T 5137.4-2020.Test methods of safety glazing materials used on road vehicles-Part 4: Determination of solar characteristic. 1范围 GB/T 5137的本部分规定了汽车安