GB/T 39380.1-2021喷水灭火用氯化聚氯乙烯(PVC-C)管道系统第1部分:管材标准
英文:Chlorinated poly (vinyl chloride) (PVC-C) piping system for fire sprinkler installations—Part 1:Pipes GB/T 39380.1-20...
英文:Chlorinated poly (vinyl chloride) (PVC-C) piping system for fire sprinkler installations—Part 1:Pipes GB/T 39380.1-20...