beam-type maser

例句：

1. 1.The beam-type microwave source is used for remote control.
   这种光束型微波源用于遥控。
2. 2. The beam-type microwave source was developed by a team of engineers.
   这种光束型微波源是由一群工程师开发的。
3. 3. The beam-type microwave source is widely used in modern communication systems.
   这种光束型微波源在现代通信系统中被广泛应用。