seated directional valve

例句：

1. 1.The car's seating directional valve needs to be adjusted for optimal comfort.
   汽车的座椅方向阀需要调整以获得最佳舒适度。
2. 2.The engineer replaced the worn-out seating directional valve with a new one.
   工程师用一个新的磨损的座椅方向阀替换了旧的。
3. 3. The technician checked the seating directional valve and found no signs of leakage.
   技术人员检查了座椅方向阀，没有发现泄漏的迹象。