GB/T 15558.4-2023燃气用埋地聚乙烯(PE)管道系统第4部分:阀门国家标准
英文:Buried polyethylene(PE) piping systems for the supply of gaseous fuels—Part 4:Valves GB/T 15558.4-2023介绍: 国家标准《燃气用埋地聚...
英文:Buried polyethylene(PE) piping systems for the supply of gaseous fuels—Part 4:Valves GB/T 15558.4-2023介绍: 国家标准《燃气用埋地聚...