On a farm you’ll find water troughs, each with a ball cock that floats on the surface of the water and opens or closes the tap to control the flow of water into the trough. A well-functioning ball ....
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On a farm you’ll find water troughs, each with a ball cock that floats on the surface of the water and opens or closes the tap to control the flow of water into the trough. A well-functioning ball ....
