首先对叶片进气边分区进行了模拟外来物损伤试验，并对外伤叶片和损伤后的修理叶片分别进行了疲劳试验。
Firstly, simulated . experiments of FOD on the leading edge of the blade were performed. Then, the damaged blades were fatigue tested.
所述的手拉盘进气孔、导风罩上的翻边和手拉盘翻边形成进气通道，构成噪声阻隔结构。
The air inlet holes of the hand disc, the flanging of the wind guide cover and the flanging of the hand disc form an air inlet channel, resulting in a noise separating structure.
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