Plastics piping systems with structured-wall pipes for soil and waste discharge (low and high temperature) inside buildings - Unplasticized poly(vinyl chloride) (PVC-U) - Part 1: Specifications for pipes and the system
建筑物内部用于土壤和废物排放(低温和高温)的结构壁管的塑料管道系统 - 未增塑的聚氯乙烯(PVC-U) - 第1部分:管道和系统的规格