small control switches

例句：

1. 1.The small control switches are responsible for the safety of the elevator.
   小型控制开关负责电梯的安全。
2. 2. The engineers installed the small control switches in the factory.
   工程师们在工厂里安装了小型控制开关。
3. 3. The small control switches were designed to be easy to use and maintain.
   小型控制开关设计得易于使用和维护。