无线通信系统中的方法；系统，发射器和接收器。
Method in wireless telecommunication system; system, transmitter and receiver.
发射器和接收器内装有光源和所有电子元件和控制元件。
The transmitter-receiver housing contains the light source and all electronic and control functions .
发射器和接收器内装有光源和所有电子元件和控制元件。
The transmitter-receiver housing contains the light source and all electronic and control functions.
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