radio tube

While briefly sharing in the helplessness, confinement and danger of the war, he spent his time studying a twenty-five-cent handbook on electronics, the RCA Radio Tube Manual, and invented a new way of enciphering speech.

当他面临无助、限制和危险时，他把精力投入到一本25分钱的电子学手册上，并且想出了一种语音加密的新方法。

In a radio tube there is a source of electrons.

在电子管中，有一个电子发射源。

Audion: Elementary radio tube developed by Lee De Forest ( patented 1907).

三极检波管：由美国的德福雷斯特所发明（1907年获专利权）的一种基本的电子管。

With the development of semiconductor industry, in many applications such as pulse power and variable power supply, application of solid-state switch instead of radio tube and traditional electromagnetic relay will be possible and the trend, and solid state switch will be used in more fields.

随着半导体技术的发展，在脉冲功率及可变电源等应用中，使用固体开关代替电真空器件与传统的电磁式继电器已成为可能和趋势，并应用于更广泛的领域。

It joins rapidly, keeps in touch with the characteristic such as being reliable, apply to the radio equipment and electron tube instrument field and join the coaxial cable of the radio frequency extensively.

它具有连接迅速，接触可靠等特点，广泛应用于无线电设备和电子仪器领域连接射频同轴电缆。