Standard Code | Standard Title | Standard Class | Order |
---|---|---|---|
GB/T 20221-2023 |
Pressureless buried sewage and drainage rigid polyvinyl chloride (PVC-U) pipes {译} 无压埋地排污、排水用硬聚氯乙烯(PVC-U)管材 |
China National Standards Pressureless buried sewage |
English PDF |
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