A mechanical component with two rings pivoted on axes at right angles to each other allowing movement in two directions used in the flap extension and retraction system.
襟翼的伸出和收上系统内的具有两个圆环的机械部件。两个圆环的旋转轴相互垂直，以使部件在两个方向都能转动。
A mechanical component with two rings pivoted on axes at right angles to each other allowing movement in two directions used in the flap extension and retraction system.
襟翼的伸出和收上系统内的具有两个圆环的机械部件。两个圆环的旋转轴相互垂直，以使部件在两个方向都能转动。
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