vacuum-tube modulator

例句：

1. 1. The vacuum tube modulator is used to amplify the signal.
   真空管调制器用于放大信号。
2. 2.The vacuum tube modulator is an essential component of the communication system.
   真空管调制器是通信系统的一个必要组成部分。
3. 3. The vacuum tube modulator was developed by a team of engineers in the 1950s.
   真空管调制器是由一支工程师团队在20世纪50年代开发的。