ygs67 发表于 2018-3-20 12:52:53

ASTM A336 A336M-18

ASTM A336 A336M-18 Standard Specification for Alloy Steel Forgings for Pressure and High-Temperature Part

admin 发表于 2018-3-21 16:21:59


谢谢您的分享，金币已奖励!
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