DBW20B3-5X/315YU6EW110N9K4V
DBW20B3-5X/315YU6EW110N9K4V
DBW20B3-5X/315YU6EW110N9K4V
DBW20B3-5X/315YU6EW110N9K4V
（1）機動換向閥，機動換向閥又稱行程閥。
（2）電磁換向閥，電磁換向閥是利用電磁吸引力操縱閥芯換位的方向控制閥。
（3）電液換向閥，電液換向閥是由電磁換向閥和液動換向閥組成的復(fù)合閥。
（4）手動換向閥，手動換向閥是用手推杠桿操縱閥芯換位的方向控制閥
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