switching selector repeater

例句：

1. 1.The switching selector is used to switch between different modes of operation.
   切换选择器用于在各种操作模式之间切换。
2. 2.The repeater was designed to boost the signal strength in areas with poor reception.
   重复器被设计用来增强信号强度，特别是在信号接收不良的区域。
3. 3. In this project, we are using a switching selector to control the flow of data.
   在这个项目中，我们使用一个切换选择器来控制数据流。