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单词 crown wheel
释义

WordReference Random House Unabridged Dictionary of American English © 2024
crown wheel′, [Horol.]
  1. Timea wheel next to the winding knob, having two sets of teeth, one at right angles to its plane.
  2. Timeany of various wheels having the form of a hoop or short cylinder with a serrated edge, as the escape wheel in a verge escapement.
  • 1640–50

Collins Concise English Dictionary © HarperCollins Publishers::
crown wheel n
  1. the wheel next to the winding knob that has one set of teeth at right angles to the other
  2. the larger of the two gears in a bevel gear
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