loop jack switch board

例句：

1. 1. The loop jackswitch board is used to control the flowof oil in the engine.
   循环千斤顶开关板用于控制发动机中油的流动。
2. 2.The loop jack switch board was designedto make maintenance easier for mechanics.
   循环千斤顶开关板的设计是为了使维修工作对机械师来说更加容易。
3. 3. The loopjack switch board is a crucial componentof the engine's operation.
   循环千斤顶开关板是发动机运行的关键部件。