12 Aircraft, autogyros, airballoons, gliders, seaplanes, amphibious airplanes, turbo-jet airplanes, turbo-prop airplanes, airships, propeller airplanes, helicopters, spacecraft, and their parts and fittings, namely, rotor blades, landing gears, seats, structural struts, landing gear wheels, wings, flight control gears, tires, inner tubes, fuselages, fuel tanks, vertical and horizontal stabilizers, airplane propellers, oil hydraulic system components