2721| 1
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滾珠軸承與內外圈圓槽的關系 |
點評
圓柱滾子的一般是線接觸吧?
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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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