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齿轮风扇发动机
avia.
geared fan engine
(一种在风扇与一级压缩机之间安装有减速齿轮的涡扇发动机。减速齿轮一方面可让风扇在亚声速状态下工作,同时又可让压缩机以另一更高效率的转速运转)
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