GB/T 18998.3-2022工业用氯化聚氯乙烯(PVC-C)管道系统第3部分:管件标准
英文标题:Chlorinated poly(vinyl chloride)(PVC-C)piping systems for industrial applications—Part 3:Fittings GB/T 18998.3-2022...
英文标题:Chlorinated poly(vinyl chloride)(PVC-C)piping systems for industrial applications—Part 3:Fittings GB/T 18998.3-2022...