12 Aerial conveyors; air-cushion vehicles; apparatus, machines and devices for aeronautics, namely, hydraulic and mechanical equipment for flight control, namely, parts of aircraft, namely, mechanical or hydraulic forged parts for rudder and pitch trim control actuators, landing gear, parts of aircraft wheels, namely, hubs and flanges, component parts for airplane and helicopter brakes, namely, torque tubes, torque plates and hydraulic brake housings, structural parts of aircraft, namely, pylon struts, parts for clutches for land vehicles, namely, friction linings, pumps, bearings, mountings, seals consisting of carbon or of carbon reinforced with carbon fibers, of plastic reinforced with carbon fibers, of carbon bound with synthetic resin, of carbon impregnated with synthetic resin or of carbon impregnated with synthetic resin or natural resin, including fiber-containing forms, or of pyrocarbon, all the above-mentioned materials also including graphitic forms of carbon, or of sintered metal or of silicon carbide, or of graphite foils or graphite laminates; nacelles comprised of an inlet cowl, fan cowls, pylon/strut, exhaust nozzle, and exhaust cone; structural replacement parts and fittings for aircraft; aircraft; hot air balloons; shock absorbers for airplanes; safety belts for airplane seats; hydraulic circuits for airplanes; safety devices for air transport apparatus in the nature of air bags; safety harnesses for airplane seats; airplane windows; hydroplanes, hydrofoils; airplane doors; airplane seats; ejector seats for airplanes