EN 15566-2009 Railway applications - Railway rolling stock - Draw gear and screw coupling (Incorporates Amendment A1 2010)《轨道交通 铁路车辆 牵引装置和螺旋连接器》.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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