GB/T 18993.2-2020冷热水用氯化聚氯乙烯(PVC-C)管道系统第2部分:管材标准
英文:Chlorinated poly (vinyl chloride) (PVC-C) piping systems for hot and cold water installations—Part 2:Pipes GB/T 18993...
英文:Chlorinated poly (vinyl chloride) (PVC-C) piping systems for hot and cold water installations—Part 2:Pipes GB/T 18993...