42 TECHNICAL CONSULTATION RELATING TO THE DESIGN, DEVELOPMENT, AND TESTING OF AERO ENGINES AND GAS TURBINES AS WELL AS PARTS THEREOF; SCIENTIFIC AND INDUSTRIAL RESEARCH RELATING TO THE DESIGN, DEVELOPMENT, MANUFACTURE, REPAIR, MAINTENANCE, ASSEMBLY, DISMANTLING, OVERHAULING AND TESTING OF AERO ENGINES AND GAS TURBINES AS WELL AS PARTS THEREOF; MONITORING, DIAGNOSIS AND PROGNOSIS OF AERO ENGINES, IN PARTICULAR JET ENGINES AND PROPELLER TURBO JET ENGINES, GAS TURBINES AND PARTS THEREOF; RESEARCH AND DEVELOPMENT IN THE FIELD OF CONSTRUCTION PRINCIPLES; ENGINEERING SERVICES IN THE MENTIONED FIELDS; RESEARCH AND DEVELOPMENT OF TECHNOLOGY RELATING TO THE DEVELOPMENT, MANUFACTURE, REPAIR, MAINTENANCE, ASSEMBLY, DISMANTLING AND OVERHAULING AND TESTING OF AERO ENGINES AND GAS TURBINES AS WELL AS PARTS THEREOF AND THE DESIGN, DEVELOPMENT, REPAIR, MAINTENANCE, SERVICE, DISMANTLING, OVERHAULING AND TESTING OF AERO ENGINES, IN PARTICULAR JET ENGINES AND PROPELLER TURBO JET ENGINES; GAS TURBINES, IN PARTICULAR SHAFT OUTPUT ENGINES AND PARTS THEREOF, NAMELY, TURBO COMPRESSORS, TURBO CHARGERS, MECHANICALLY DRIVEN COMPRESSORS, TRANSMISSION COMPONENTS, LIQUID AND FUEL PUMPS, PUMP DRIVES, RADIAL AND AXIAL BLOWERS, FANS, GUIDE GRIDS FOR TURBO ENGINES, GAS FLOW CONTROL, AXIAL AND RADIAL TURBINES, SOUND ABSORBERS, FUEL PIPES, FUEL REGULATORS, FUEL GAUGE DEVICES, FUEL INJECTION PUMPS, NOZZLES AND VALVES, PNEUMATIC STARTING MOTORS, FIXED AND DETACHABLE MACHINE COUPLINGS, HYDRAULIC TRANSMISSION COMPONENTS AND COUPLINGS, OIL AND FUEL FILTERS, FLUID FILTERS, CENTRIFUGES, BEARINGS FOR SHAFTS, AXLES, ROTORS AND TRANSMISSION COMPONENTS, COGGED WHEELS, IGNITORS, IGNITION DEVICES, PROFILED TUBES AND MANIFOLDS, HOUSINGS, ASSEMBLY DEVICES FOR DRIVES, CONTROL GEAR, GASKETS, NAMELY, BRUSHES, LABYRINTH AND ROTATING MECHANICAL SEALS, GASKET RINGS, COMPRESSOR ROTORS, DISCS, STATORS, ROTORS, INTEGRALLY BLADED ROTORS AND HOUSINGS, NAMELY, FOR TURBO ENGINES, BLADES, NAMELY, VANES AND ROTOR BLADES FOR TURBO ENGINES, THRUST NOZZLES FOR AERO ENGINES AS WELL AS COMPONENTS AND PARTS OF THE AFORESAID GOODS