NF F05-510-1992 Railway fixed equipment - Environnemental conditions generated by or to which signaling or driver-aid devices or equipments are subjected 《铁路固定设备 由信号发生装置或驾驶员辅助装置或设备.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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