NF F03-402-1979 Railway transport equipment Wheel sets for standard gauge rolling stock Theoretical wheel profile V of 135 mm 《铁路运输设备 标准轨距铁路车辆的轮组 135毫米的V形理论轮剖面》.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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