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一条简单的空间几何曲线怎样绕X轴旋转？请教高手~如下面的曲线：
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[ 本帖最后由 bush9898 于 2008-2-2 13:58 编辑 ] |
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发表于 2008-2-2 13:48:11
发表于 2008-2-4 22:13:00
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