ygs67 发表于 2015-6-19 14:22:07

ASTM A234 A234M-13

ASTM A234 A234M-13 Specification for Piping Fittings of Wrought Carbon Steel and Alloy Steel for Moderate and High Temperature Service

admin 发表于 2015-6-23 12:10:23

谢谢您的分享,金币已奖励!
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