| 摘要 |
A multi-purpose interlocking pentagonal block having five points each formed with a slot, the slot having a width slightly greater than a thickness of the block, two adjacent edges of the block having a notch therebetween, the notch having a width greater than the width of the slot, whereby the multi-purpose interlocking block can be assembled with other similar blocks into many different structures and can be used as a dart or top to play with.
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