((Information |Description = ((zh-hant|現代反向旋轉無涵道風扇發動機概念的全尺寸技術演示。發動機測試))((en|Full scale technology demonstration of a modern counterrotating unducted fan engine concept. Engine test)) |Source = https://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/19900000733.pdf |Date = December 1987 |Author = GE Aircraft Engines ))
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