GB/T 28799.2-2020冷热水用耐热聚乙烯(PE-RT)管道系统第2部分:管材标准
英文:Polyethylene of raised temperature resistance (PE-RT) piping systems for hot and cold water installations—Part 2: Pip...
英文:Polyethylene of raised temperature resistance (PE-RT) piping systems for hot and cold water installations—Part 2: Pip...