- a device for regulating the flow of a liquid into a tank, cistern, etc, consisting of a floating ball mounted at one end of an arm and a valve on the other end that opens and closes as the ball falls and rises with the water level in the cistern
| 单词 | ball cock |
| 释义 | WordReference Random House Unabridged Dictionary of American English © 2024 ball′ cock′,
Collins Concise English Dictionary © HarperCollins Publishers:: ball cock n
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