发明授权
US4474377A Eleven-plane cubical puzzle 失效
十一平面立方体拼图

Eleven-plane cubical puzzle
摘要:
The eleven-plane cubical puzzle, shown in FIG. 1, is a puzzle in the shape of a cube whose twenty-four exposed pieces may be permuted by rotations of groups of said pieces about any of seven axes passing through the vertices and the centers of the faces of said cube.
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