closed center directional stem
closed center hydraulic system
closed center pilot control valve
closed center pilot valve
closed center solenoid valve
closed center type valve
closed position
闭合位置
闭合的位置
停止位置
空席
闭阀位
关闭位置
平仓
闭式舞姿
closed-position ignition
hydraulic system: closed center
normally closed position
position closed loop control
position closed-loop control
two-position closed loop control