兑水 发表于 2009-9-10 20:28:27

ASTM A 1019-2001 下水道和排水管路用的有聚合物滤料层36英寸...

A1019/A1019M-01 Standard Specification for Closed Rib Steel Pipe with Diameter of 36 in. or Less, Polymer Precoated for Sewers and Drains
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