GB/T 28799.1-2020冷热水用耐热聚乙烯(PE-RT)管道系统第1部分:总则标准
英文:Polyethylene of raised temperature resistance(PE-RT)piping systems for hot and cold water installations—Part 1: Gener...
英文:Polyethylene of raised temperature resistance(PE-RT)piping systems for hot and cold water installations—Part 1: Gener...