ygs67 发表于 2015-6-16 15:10:26

ASTM A1076 A1076M-13

ASTM  A1076  A1076M-13 Standard Specification for Cold Formed Carbon Structural Steel Tubing Made from Metallic Precoated Sheet Steel

admin 发表于 2015-6-18 08:27:13

谢谢您的分享,金币已奖励
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