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  1. Oxford Dictionary

    wheel and axle

    • n.
      a simple lifting machine consisting of a rope which unwinds from a wheel on to a cylindrical drum or shaft joined to the wheel to provide mechanical advantage.

    • noun: wheel and axle, plural noun: wheels and axles

    • 更多解釋

    wheel and axle

    • IPA[(h)wēl and]
    • n.
      a simple lifting machine consisting of a rope which unwinds from a wheel on to a cylindrical ...

    Oxford American Dictionary