FIELD: puzzles. SUBSTANCE: inner body is mounted in a hollow transparent case in a spaced relation to the case for passing a play ball. The body is made with blind channels which communicate with the clearance. A rod is mounted on the axis of symmetry of each channel, the ball is made with holes. EFFECT: improved structure. 2 cl, 2 dwg
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|---|---|---|---|
| PUZZLE | 1992 |
|
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