“电子管”造句
电磁波是由一种称为速调管的微波
电子管产生的.
The electronmagnetic wave is produced by microwave tubes called klystrons.
这些工厂生产
电子管 、 晶体管 、 收音机和电视机.
These factories produce tubes, transistors, radio sets and TV sets.
这些放大器是用微型
电子管制成的.
These amplifiers have long been made with tiny election tubes.