GB/T 28799.4-2024冷热水用耐热聚乙烯(PE-RT)管道系统第4部分:阀门国家标准
英文:Polyethylene of raised temperature resistance(PE-RT) piping systems for hot and cold water installations—Part 4:Valve...
英文:Polyethylene of raised temperature resistance(PE-RT) piping systems for hot and cold water installations—Part 4:Valve...