wanderer1997 发表于 2015-11-11 00:01:07

ASTM A291-05(2015)



ASTM A291/A291M-05(2015) Standard Specification for Steel Forgings, Carbon and Alloy, for Pinions, Gears and Shafts for Reduction Gears

admin 发表于 2015-11-11 09:52:35

谢谢您的分享,金币已奖励!
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