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ratch

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Noun ratch has 1 sense
  1. ratchet, rachet, ratch - mechanical device consisting of a toothed wheel or rack engaged with a pawl that permits it to move in only one direction
    --1 is a kind of mechanical device
    --1 is a part of spiral ratchet screwdriver, ratchet screwdriver
    --1 has parts: pawl, detent, click, dog; ratchet wheel
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