GB/T 13894-2023 Chinese PDF (GB/T13894-2023) GB/T 45300-2025 3-2023_Chinese: Buried polyethylene(PE) piping systems

3-2023_Chinese: Buried polyethylene(PE) piping systems for the supply of gaseous fuels - Part 3: Fittings (Chinese: 燃气用埋地聚乙烯（PE）管道系统 第3部分：管件)

GB 44703-2024_Chinese: General requirements for optical radiation safety (Chinese: 光辐射安全通用要求)

3-2024_Chinese: Mechanical vibration and shock - Characterization of the dynamic mechanical properties of visco-elastic materials - Part 3:CAntilever shear beam method (Chinese: 机械振动与冲击 黏弹性材料动态力学性能的表征 第3部分：悬臂剪切梁法)

English versions: GB/T 11356

GB/T 13894-2023 Chinese PDF (GB/T13894-2023) GB/T 45300-2025 3-2023_Chinese: Buried polyethylene(PE) piping systemsGB T 13894 2023_Chinese: Petroleum and liquid petroleum products Level measurement Manual methods (Chinese: ) Note Careful: Text of PDF is in Chinese (not English). Delivery (PDF in Chinese): 2 working hours typically, ASAP English versions: GB T 13894 2023