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- Ring torus, wireframe model of a donut. Surface revolution in geometry, generated by revolving a circle in three-dimensional space one full revolution about an axis that is coplanar with the circle. Puzzle #840045544
Ring torus, wireframe model of a donut. Surface revolution in geometry, generated by revolving a circle in three-dimensional space one full revolution about an axis that is coplanar with the circle. Puzzle #840045544