5709| 14
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關于材料許用扭轉切應力請教 |
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點評
3.5mm的軸,你用多大的鍵呀???神器的軸徑
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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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