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Relation: subclass

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Rudder1A Rudder is a primary control surface used to steer a ship, boat, submarine, hovercraft, airship,...^
FlightControlSurfaces3Flight control surfaces are aerodynamic devices allowing a pilot to adjust and control the aircraft...^
    FlightRudder.The FlightRudder is typically mounted on the trailing edge of the vertical stabilizer, part of th...^

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