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  1. Oxford Dictionary

    ballcock

    • IPA[ˈbɔːlkɒk]

    英式

    • n.
      a valve which is linked by a hinged arm to a ball floating on top of a liquid and opens or closes a tap automatically according to the height of the ball, especially in the cistern of a flushing toilet.

    • noun: ballcock, plural noun: ballcocks

    • 更多解釋

    ballcock

    • IPA[ˈbôlˌkäk]

    美式

    • n.
      a valve that automatically fills a tank after liquid has been drawn from it. Used, for example, ...

    Oxford American Dictionary