NC 61-45-1987 Telecommunications Band Antenna for 142 MHz to 174 MHz Band Quality Specifications《远距离通讯 天线频带，142 MHz 到 174 MHz 质量规范》.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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