Vacuum tubes [radio]

Now we finally come to electronic instruments. In these instruments sounds are produced by varying the oscillations of radio tubes with the exception of the Hammond organ.

现在该说说电子乐器了。除哈蒙德电风琴，这类乐器全是靠变换无线电真空管振荡而发声的。

We have, for example, dramatically reduced the physical bulk of our radios, by substituting transistors for vacuum tubes.

例如，我们用晶体管取代真空管，使无线电的体积大为缩

"The technology of radio improvement followed the development of the vacuum tube, the electronic-tube oscillator, the tuned circuit, and other components."

无线电技术随着真空管、电子管振荡器、调谐电路以及其它部件的发展而不断改善。

S/C Vacuum Sol Control

Ｓ／Ｃ真空电磁螺线管控制

The Configuration and Simulation Analysis of the Antenna in Air Based Radio Monitoring

空中无线电监测中天线配置及仿真分析

contracted code sonde

发送电码无线电探空仪

aeronautical radio communication station

航空无线电通信电台

aeronautical radio beacon station

航空无线电信标电台

Transmission of messages by radiotelegraphy.

用无线电传真传送信息

"Radio wave are used in standard Broadcast radio and television, navigation and air-traffic control, cellular telephony, and even remote-controlled toys."

无线电波用于电视、电台、导航、空中交通管制、通讯、雷达、遥控玩具。

radiosounding system

无线电高空测候技术

radio controlled aerial target

无线电控制的空中目标

radiosonde-radiowind system

无线电探空测风系统

aeronautical radionavigation service

航空无线电导航业务

aeronautical communications log

航空无线电台工作日志

variable-audio-frequency radiosonde

变声频无线电探空仪

radio controlled aerial-navigation

无线电控制空中航行区

radio-wave refractive index of air

无线电波的空气折射率