5753| 10
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今天自習(xí)又在亂想了,,想的是磁力的應(yīng)用 |
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點評
減震這個,,我見過一個專利描述,。具體設(shè)計沒見過。
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小黑屋|手機版|Archiver|機械社區(qū) ( 京ICP備10217105號-1,,京ICP證050210號,浙公網(wǎng)安備33038202004372號 )
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