发明公开
EP1371401A1 3d jigsaw puzzle 有权
3d拼图

3d jigsaw puzzle
摘要:
A three dimensional jigsaw puzzle has pieces with protrusions and cutouts. The protrusions and cutouts of every two adjacent pieces correspond to each other. Each piece is a tangential area of a sphere so that when the pieces are all combined, the sphere is formed.
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