英语词典
To revolve ( the telescope of a surveying transit) about its horizontal transverse axis in order to reverse its direction. a rotating airfoil on the tail of a single-rotor helicopter; keeps the helicopter from spinning in the direction opposite to the rotation of the main rotor.
旋转使(中星仪的望远镜)围绕其水平模轴旋转,并转向一个相反的方向单转子直升飞机尾部上的旋转机翼;防止直升飞机的旋转方向与主转子相反。
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