Parts for engines not for land vehicles, namely, rocket nozzle throats, rocket nozzle inserts, thrust chambers, combustion chambers, solid rocket motor igniter cases, jet vanes; parts for gas turbines and compressors, namely, rotors, stators, vanes, nozzles, blades and heat shields; cutting machines for cutting metals, wood, plastics and composites and cutting tools as parts of machines; heat protection shields comprised of ceramics, metals or ceramo-metal composites as parts of gas turbines ...