(a) a large metal ring to which a cable may be fastened; (b) Geometry a torus (torus, n. 4) that resembles a ring, formed by the revolution of a…
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| 释义 | the world > relative properties > number > geometry > shape or figure > [noun] > three-dimensional > solid of revolution > formed from curve > torus (4) anchor ring1783 (a) a large metal ring to which a cable may be fastened; (b) Geometry a torus (torus, n. 4) that resembles a ring, formed by the revolution of a… annulus1802 Geom. ‘The name of a ring, or solid formed by the revolution of a circle about a straight line exterior to its circumference as an axis, and in the… tore1867 Geometry. = torus, n. 4. torus1870 Geometry. Originally: a surface or solid generated by the revolution of a circle or other conic about any axis; e.g. a solid ring of circular or… |
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