4965| 23
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關于導柱與導套的硬度設計問題 |
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點評
都知道這樣用,但為什么這樣用好多工程師說不出來。
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Archiver|手機版|小黑屋|機械社區 ( 京ICP備10217105號-1,京ICP證050210號,浙公網安備33038202004372號 )
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