CNS 14378-1999 Information technology-Telecommunications and information exchange between systems - Use of X 25 to provide the OSIconnection- Mode network service《信息技术－系统间电信与信息交换－使.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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