显像真空管

例句：

1. 1.The vacuum tube was the first electronic deviceinvented by Edison.
   真空管是爱迪生发明的第一个电子装置。
2. 2. The vacuum tubeamplifier is used to amplifyaudio signals.
   真空管放大器用于放大音频信号。
3. 3.The vacuum tube was replaced by transistors in the 1950s.
   真空管在20世纪50年代被晶体管取代。