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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

WordNet (r) 3.0 (2006) (WordNet)

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}]

The Collaborative International Dictionary of English v.0.48 (gcide)

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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