ygs67 发表于 2015-6-17 10:16:51

ASTM A961 A961M-13

ASTM A961 A961M-13 Standard Specification for Common Requirements for Steel Flanges, Forged Fittings,Valves, and Parts for Piping Applications

admin 发表于 2015-6-18 08:32:46

谢谢您的分享,金币已奖励
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