mechen 发表于 2016-4-4 16:37:04

(ASM) Gear Materials, Properties, and Manufacture by J.R. Davis

本帖最后由 mechen 于 2016-4-4 16:38 编辑

(ASM) Gear Materials, Properties, and Manufacture by J.R. Davis

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admin 发表于 2016-4-8 09:44:49

谢谢您的分享，金币已奖励！
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