GB/T 38689-2020.Corrosion-resistant alloy cold-rolled sheets and strips.1范围GB/T...

国家标准2023.07.28

GB/T 38688-2020.Corrosion-resistant alloy of hot rolled plates.1范围GB/T 38688规定了耐...

国家标准2023.07.28

GB/T 15008-2020.Corrosion-resistant alloy bars.1范围GB/T 15008规定了耐蚀合金棒材的分类、订货内容、尺寸...

国家标准2023.07.28

GB/T 24260-2020.Petroleum seismic geophone.1范围GB/T 24260规定了石油地震检波器(以下简称检波器)的分类、要...

国家标准2023.07.28

GB/T 896-2020."E"rings.1范围GB/T 896规定了公称直径d2=0.8 mm~30 mm开口挡圈(以下简称挡圈)的代号、型式尺寸、承载能...

国家标准2023.07.28

GB/T 38650-2020.Safety information markings of piping systems-Design principles...

国家标准2023.07.28

GB/T 38710-2020.Guidelines for oil and gas transmission pipeline geographic info...

国家标准2023.07.28

GB/T 3098.23-2020.Mechanical properties of fasteners-M42~M72 bolts, screws and s...

国家标准2023.07.28

GB/T 38700-2020.Data element of special equipment traceability system.1范围GB/T 38...

国家标准2023.07.28

GB/T 38656-2020.Specification of date exchange for special equipment IoT system....

国家标准2023.07.28