Secondly, this thesis investigates the designing methods for VOR/DME-based area navigation flight procedure (RNAV FP).
其次，研究了基于VOR/DME导航台的区域导航飞行程序的设计方法；
Secondly, this thesis investigates the designing methods for VOR/DME-based area navigation flight procedure (RNAV FP).
其次，研究了基于VOR/DME导航台的区域导航飞行程序的设计方法；
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