2963| 6
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如何車四半環(huán)或六半環(huán),要求車后六半或四半弦長相等,請教 |
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點評
圓能車出幾等分來?
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Archiver|手機版|小黑屋|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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