NF C33-221-1990 Insulated or protected cables for power system concentric cables for road and street lighting for rated voltage of 3 6 6 (7 2) kv 《额定电压为 3 6 6 (7 2) kV 的道路和街道照明用电力系.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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