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ygs67 发表于 2015-6-18 09:31:32

ASTM A694 A694M-13

ASTM A694 A694M-13 Standard Specification for Carbon and Alloy Steel Forgings for Pipe Flanges, Fittings,Valves, and Parts for High-Pressure Transmission Service

admin 发表于 2015-6-23 11:40:10

谢谢您的分享,金币已奖励!

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