ETSI PRETS 300 019-A-1990 Equipment Engineering Environmental Conditions and Environmental Tests for Telecommunications Equipment Part A - Introduction and Terminology《设备工程 电信设备的环境.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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