4169| 6
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軸承的直徑與軸承內彈珠的直徑有什么聯系? |
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點評
還有它必須保證最后一個滾珠(滾子)能裝到輥道了!好像書上有那么一道題!
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小黑屋|手機版|Archiver|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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