electron tube

名词 electron tube:

1. electronic device consisting of a system of electrodes arranged in an evacuated glass or metal envelope
   同义词：tube, vacuum tube, thermionic vacuum tube, thermionic tube, thermionic valve

1. An electrode used in certain electron tubes to provide secondary emission.
   中间极，二次发射电极一种用于一定电子管作第二次发射电极
2. A highly evacuated electron tube containing an anode, a cathode, and a control grid.
   三极管带有阳极、阴极和控制栅极的高真空的电子管
3. An electron tube having a cathode and an anode.
   电子二极管有一个阳极和一个阴极的电子管