JUS M D1 520-1989 Lifts Planning and selection passenger lifts to be installed in residental buildings《升降机 规划及选择适合与住宅楼安装的客梯》.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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