ANTENNA, a device which, used in conjunction with a transmitter or receiver, is used for radiating or receiving radio waves.
天线，一种与发射机或接收机共同工作来发射或接收无线电波的装置。
Gain control circuit, receiver and transmitter, radio communication device and system.
增益控制电路，接收器和发送器，无线通信装置和系统。
The utility model relates to a signalling device used for facilitating automobiles overtaking, which is composed of a transmitter, a receiver and a feedback signal lamp.
一种汽车用超车装置由发射机、接收机反馈信号灯所组成。
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