止回阀
/ˈtʃɛk ˈvalv/
n
English: check valve · 止回阀
English · check valveEspañol · válvula de controlFrançais · clapet de retenueDeutsch · Rückschlagventil
释义：Valve with a toggle preventing water from backing up into the sump.
English: check valve · 止回阀