兑水 发表于 2009-9-24 07:49:26

ASTM C 1541-2004 用柔性聚氯乙烯（PVC）垫圈连接不同排水...

C1541-04 Standard Specification for Shielded Transition Couplings Using Flexible Poly Vinyl Chloride (PVC) Gaskets to Connect Dissimilar DWV Pipe and Fittings
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