ITU-R INFORME BO 631-4 SPANISH-1990 Frequency sharing between the broadcasting-satellite service (sound and television) and terrestrial services《广播卫星(声音和电视)和地面卫星间频率的共享》.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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