GB/T 39239-2020.Non-destructive testing-Ultrasonic testing一Characterization and sizing of discontinu...

GB/T 39240-2020.Non-destructive testing-Ultrasonic testing-General principles. 1范围 GB/T 39240规定了能够传播...

GB/T 40045-2021.Fuel specification for hydrogen powered vehicles-Liquid hydrogen(LH2). 1范围 GB/T 4004...

GB/T 40060-2021.Technical requirements for storage and transportation of liquid hydrogen. 1范围 GB/T 4...

GB/T 39881-2021.Examination methods for methaqualone in suspected drugs-Gas chromatography and gas c...

GB/T 40020-2021.Cyber-physical systems-Reference architecture. 1范围 GB/T 40020规定了信息物理系统参考架构,确定了信息物理系统...

GB/T 39880-2021.Examination methods for methadone in suspected drugs-Gas chromatography and gas chro...

GB/T 39882-2021.Examination methods for methylene dioxymetham phetamine in suspected drugs-Gas chrom...

GB/T 12243-2021.Spring loaded safety valves. 1范围 GB/T 12243规定了弹簧直接载荷式安全阀(以下简称安全阀)的设计.性能、试验和检验、外观、标志和...

GB/T 40023-2021.Non-destructive testing instruments-Ultrasonic time-of-flight diffraction instrument...