GB/T 18742.2-2017冷热水用聚丙烯管道系统第2部分:管材国家标准
英文:Polypropylene (PP) piping systems for hot and cold water installations—Part 2: Pipes GB/T 18742.2-2017介绍: 国家标准《冷热水用聚丙...
英文:Polypropylene (PP) piping systems for hot and cold water installations—Part 2: Pipes GB/T 18742.2-2017介绍: 国家标准《冷热水用聚丙...