ITU-R REPORT BS 1200-1990 The effect of delay in sound-programme operations《声音节目操作中的延迟作用》.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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