The anode in an electron tube.

阳极电子管中的阳极。

An electron tube or a vacuum tube.

电子管或真空管。

The field of electronics includes the electron tube, transistor, integrated circuits and so on.

电子学的范围包括电子管、晶体管和集成电路等。

An electron tube used to amplify or generate ultrahigh frequency by means of velocity modulation.

速调管一种用速度调节的方法放大或产生超高频率的电子管。

The phototube, a very special type of electron tube, is the heart of the talking-picture projector.

光电管，一种非常特殊的电子管，是有声电影放映机的心脏。