column switching valve

例句：

1. 1.The column switching valve is used to control the flow of oil in the engine.
   柱塞式切换阀用于控制发动机中油的流动。
2. 2. The column switching valve is an essential component of the fuel system.
   柱塞式切换阀是燃油系统的一个关键部件。
3. 3.The column switching valve allows for precise control over the amount of oil being injected into the engine.
   柱塞式切换阀允许对注入发动机中的油量进行精确控制。