GB/T 18993.3-2020冷热水用氯化聚氯乙烯(PVC-C)管道系统第3部分:管件标准
英文:Chlorinated poly (vinyl chloride) (PVC-C) piping systems for hot and cold water installations—Part 3:Fittings GB/T 18...
英文:Chlorinated poly (vinyl chloride) (PVC-C) piping systems for hot and cold water installations—Part 3:Fittings GB/T 18...