semiautomatic switcher

例句：

1. 1. The semiautomatic switcher is used to control the lighting in a room.
   半自动开关器用于控制房间的照明。
2. 2. The engineer designed a new semiautomatic switcher for the factory automation system.
   工程师为工厂自动化系统设计了一种新的半自动开关器。
3. 3. The semiautomatic switcher was easy to operate and had a long lifespan.
   这种半自动开关器操作简单且使用寿命长。