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  1. worm gear

    • n.
      a mechanical arrangement consisting of a toothed wheel worked by a short revolving cylinder (worm) bearing a screw thread.
    • noun: worm gear, plural noun: worm gears

    • 更多解釋
    • IPA[ˈwərm ˌɡir]
    • n.
      a mechanical arrangement consisting of a toothed wheel worked by a short revolving cylinder ...

    Oxford American Dictionary