ygs67 发表于 2015-6-18 09:25:37

ASTM A727 A727M-13

ASTM A727 A727M-13 Standard Specification for Carbon Steel Forgings for Piping Components with Inherent Notch Toughness

admin 发表于 2015-6-23 11:40:06

谢谢您的分享,金币已奖励!
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