| 摘要 |
Device for the mutual interchange of twenty-six pieces by rotation through 90 DEG , in groups of nine. This device has no inner spindle, is hollow, and may thus be used as a container. It consists of six central pieces 1, twelve intermediate pieces 2 and eight satellite pieces 3 equipped with tenons and/or morticed, which guide and hold the assembly during rotations. The device according to the invention is intended particularly as a brain teaser. <IMAGE>
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