ARDIDEN

motors other than for non-terrestrial vehicles, namely jet engines, turbines, turbo-motors, turbojets, turbo propellers, turbo compressors, missile motors

[air locomotive devices, namely, helicopters and aircraft]

repairing, servicing, upkeep, and maintenance services for all aircraft motors, helicopters, and in the railway industry, the constituent parts and accessories; restoration, and standard exchange of motors, motor units and their accessories used in aircraft, helicopters and in the railway industry