valve electron tube radio tube electronic valve
The electronmagnetic wave is produced by microwave tubes called klystrons.
电磁波是由一种称为速调管的微波电子管产生的。
—— 辞典例句These factories produce tubes, transistors, radio sets and TV sets.
这些工厂生产电子管 、 晶体管 、 收音机和电视机。
—— 辞典例句These amplifiers have long been made with tiny election tubes.
这些放大器是用微型电子管制成的。
—— 辞典例句A tube or a transistor can amplify an incoming signal.
电子管和晶体管能放大输入的信号。
—— 辞典例句The transmitter was pulsed by an electron tube.
电子管使发射器产生脉冲波。
—— 辞典例句