内容标题40

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                自转旋翼要求机:会飞的“风车”
                有这样一架【飞机,它和直升机一样有着大大的旋翼,却又有着如」固定翼飞机一般的尾翼,而且还有着像这么少动力伞一样的螺旋桨乍一看,你可能会认为这是一架直升机,但其娇小的身材、简 详细内容 >>

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