The constraint in the value of N<6,82 can be overcome if the planar faces of the cube become spherical parts of long radius.
如果把立方体的纯平面换成球形面，那么这个N<6.82的约束就可以解决。
The constraint in the value of N<6,82 can be overcome if the planar faces of the cube become spherical parts of long radius.
如果把立方体的纯平面换成球形面，那么这个N<6.82的约束就可以解决。
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