ITU-R INFORME M 1159 SPANISH-1990 Characteristics of an automatic identification system for VHF and UHF transmitting stations in the maritime mobile service《海上移动服务中甚高频(VHF)和超高频(UHF.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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