12 Shock Absorbers and Landing Gears for Aircraft; Aircraft Hydraulic Steering System Components-Namely, Valves, Linear and Rotary Mechanical Actuators and Mechanical and Electro-Mechanical Servo-Mechanisms; Hydraulic Servo Flight Controls Comprised of Valves, Actuators and Hydraulic, Mechanical, and Electro-Mechanical Feedback Mechanisms for Ailerons, Spoilers, Rudders, Leading Edge Slats and Flaps and Canards Surfaces, and Parts Therefor