ITU-R REPORT BT 958-1-1986 Possibilities for incorporating the sound information in the video signal in terrestrial television《将声音信息融入到地面电视视频信号中的可能性》.pdf

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ITU-R RAPPORT M 766-2 FRENCH-1990 Feasibility of frequency sharing between the GPS and other services《全球定位系统和其他服务之间的频率共享的可行性》.pdf

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