ITU-R INFORME BT 1209 SPANISH-1990 Measures for the avoidance of possible interference generated by digital television studio equipment《避免数字电话可能产生的干扰的措施》.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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