solenoid directional valve

• 电磁换向阀

solenoid directional valve的用法和样例：

例句

1. The open and close action of the covers are controlled by a solenoid directional vavle, while the speed is adjusted by the throttles.
   电磁换向阀的换向来实现密封盖的启闭，密封盖的启闭速度可由调节流阀进行调节。