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完全二十面体
Wikipedia definition
1. Final stellation of the icosahedronIn geometry, the complete or final stellation of the icosahedron is the outermost stellation of the icosahedron, and is "complete" and "final" because it includes all of the cells in the icosahedron's stellation diagram. It is also called the echidnahedron. This polyhedron is the seventeenth stellation of the icosahedron, and given as Wenninger model index 42.
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