elevator motor directional control valve
hook motor control valve spool
motor swashplate control solenoid valve
travel drive motor control valve
vibrator motor control valve manifold
winch motor control valve
actuator valve
致动器阀
阀引动器
[可变]光圈
只涉及定址的事项交易
适配率
自适应等化
虹膜
A new valve of electric hydraulic control exchange direction