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mechen 发表于 2016-4-4 17:06:16

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

本帖最后由 mechen 于 2016-4-4 17:15 编辑

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

mechen 发表于 2016-4-5 06:57:52

admin 发表于 2016-4-8 09:44:52

谢谢您的分享，金币已奖励！

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