CNS 4518-1986 Jacks Telephone (Type JJ-092 JJ-093 JJ-096 and JJ-097)《电话插口（JJ–092，JJ–093，JJ–096及JJ–097型）》.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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