ygs67 发表于 2015-6-18 09:17:58

ASTM A774 A774M-13

ASTM A774 A774M-13 Standard Specification for As-Welded Wrought Austenitic Stainless Steel Fittings for General Corrosive Service at Low and Moderate Temperatures

admin 发表于 2015-6-23 11:39:54

谢谢您的分享,金币已奖励!
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