master control switch

例句：

1. 1. The master control switch is located on the top of the cabinet.
   主控开关位于柜顶。
2. 2.The engineers had to adjust the master control switch to ensure safe operation.
   工程师们不得不调整主控开关以确保安全运行。
3. 3. The master control switch was responsible for monitoring and controlling the entire system.
   主控开关负责监控和控制整个系统。