automatic water level valve 自动水准阀 ; 主动水准阀

condenser level control valve 凝汽器水位调节阀 ; 凝汽器水位调节

ground level valve 平地阀

level control valve 液位控制阀 ; 水位调节阀

second level valve 二级阀

liquid level valve 液位阀

constant water level valve 恒定水位阀

heater level control valve 给水加热器水位调节阀

float level control valve 浮动水位控制阀