GB/T 23031.5-2023 Chinese PDF (GB/T23031.5-2023) GB 7512-2023 trailers and combination vehicles mass

trailers and combination vehicles mass parameters measurement method (Chinese: 汽车、挂车及汽车列车质量参数测量方法)

5-2024_Chinese: Proton exchange membrane fuel cell - Part 5: Test method for membrane electrode assembly (Chinese: 质子交换膜燃料电池 第5部分：膜电极测试方法)

English versions: GB/T 18916

English versions: GB/T 19964-2024

1-2023_Chinese: Buried polyethylene(PE) piping systems for the supply of gaseous fuels - Part 1: General (Chinese: 燃气用埋地聚乙烯（PE）管道系统 第1部分：总则)

GB/T 23031.5-2023 Chinese PDF (GB/T23031.5-2023) GB 7512-2023 trailers and combination vehicles massGB T 23031. 5 2023_Chinese: Industrial internet platform Application and implementation guide Part 5: Customization (Chinese: 5) Note Careful: Text of PDF is in Chinese (not English). Delivery (PDF in Chinese): 2 working hours typically, ASAP English versions: GB T 23031. 5 2023