GB/T 35451.2-2018埋地排水排污用聚丙烯(PP)结构壁管道系统第2部分:聚丙烯缠绕结构壁管材国家标准
英文:Polypropylene(PP) structure-wall piping systems for underground drainage and sewerage—Part 2: Polypropylene spirally ...
英文:Polypropylene(PP) structure-wall piping systems for underground drainage and sewerage—Part 2: Polypropylene spirally ...