red signal repeater

例句：

1. 1. The red signal repeater was used to relay signals from one location to another.
   红色信号中继器用于从一个地点将信号传递到另一个地点。
2. 2. The red signal repeater helped to improve the reliability of communication systems.
   红色信号中继器有助于提高通信系统的可靠性。
3. 3. The red signal repeater was a critical component in maintaining the safety of the military communications network.
   红色信号中继器是维护军事通信网络安全的关键组件。