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ratch n. 制轮装置;[防倒转的] 棘齿 制轮装置;[防倒转的] 棘齿 ratch n 1: mechanical device consisting of a toothed wheel or rack engaged with a pawl that permits it to move in only one direction [synonym: {ratchet}, {rachet}, {ratch}] Ratch \Ratch\ (r[a^]ch), n. (Zool.)
Same as {Rotche}. [1913 Webster] Ratch \Ratch\ (r[a^]ch), n. [See {Rack} the instrument, {Ratchet}.] A ratchet wheel, or notched bar, with which a pawl or click works. [1913 Webster]
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