ball-cock supply valve
/ˈbɔːlkˈɒk səplˈaɪ ˈvalv/
n
English · ball-cock supply valve中文 · 浮球供水阀Español · válvula de entradaFrançais · robinet flotteur à clapet
意味：Mechanism allowing or stopping the flow of water into the tank; it is activated by the float ball.