标准查询 标准查询下水用非压埋地用构造型聚氯乙烯波管.双壁管与螺纹管
Structured--wall polyvinyl chloride(PVC) pipes for non--pressure underground drainage and sewerage--Double--wall corrugated pipe and rib pipe
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标准查询Structured--wall polyvinyl chloride(PVC) pipes for non--pressure underground drainage and sewerage--Double--wall corrugated pipe and rib pipe
