Download 用sketchup來畫正八面體 octahedron 及正四面體 tetrahedron

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用sketchup來畫正八面體 octahedron 及正四面體 tetrahedron 用sketchup來畫正八面體 octahedron 及正四面體 tetrahedron 用sketchup來畫正八面體 octahedron 及正四面體 tetrahedron

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