GB/T 18742.3-2017冷热水用聚丙烯管道系统第3部分:管件国家标准
英文:Polypropylene(PP) piping systems for hot and cold water installations—Part 3:Fittings GB/T 18742.3-2017介绍: 国家标准《冷热水用聚...
英文:Polypropylene(PP) piping systems for hot and cold water installations—Part 3:Fittings GB/T 18742.3-2017介绍: 国家标准《冷热水用聚...