T/JSGS 012—2022给水及压力排污、排水用高性能 硬聚氯乙烯（PVC-UH）管件.pdf，行业分类塑料制品业。
内容简要 前言········································п1范围·······································12规…
T/JSGS 012—2022给水及压力排污、排水用高性能 硬聚氯乙烯（PVC-UH）管件.pdf，行业分类塑料制品业。
内容简要 前言········································п1范围·······································12规…