STAS 1848 6-1977 Road signs and signals ROAD TRAFFIC CONTROL LIGHTS General technical requirements for quality《路标和信号 道路交通控制灯 一般质量技术要求》.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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