7 Aircraft engines, in particular jet and turboprop engines; gas turbines, in particular turboshaft engines; gas turbine plants, in particular gas turbines combined with electric motors, generators or electric motors and generators; parts of the aforementioned goods, in particular turbo compressors, exhaust-driven turbochargers, mechanical compressors, transmissions, fluid pumps and fuel pumps, pump drives, centrifugal and axial compressors, blowers, turbo engine vanes, gas ducts, axial and radial turbines, mufflers, fuel ducts, fuel controls, fuel metering devices, injection pumps, injection nozzles and injection valves, parts of the aforementioned goods, in particular compressed air starters, couplings and clutches, hydraulic transmissions and couplings, oil and fuel filters, fluid filters, centrifuges, bearings for shafts, axles, rotors and transmissions, gears, ignitors, ignition devices, control rods, further parts of the aforementioned goods, in particular mechanical seals, namely, brush seals, labyrinth seals and end-face mechanical seals, seal rings, compressor rotors, disks, stators, rotors, integral rotors and housings in particular for turbo engines, blades, namely stationary and rotating blades for turbomachinery, further parts of the aforementioned goods, in particular jet nozzles for aircraft engines and components and replacement parts of the aforementioned goods, electric generators, electric motors; parts of turbomachinery made of fiber-reinforced composites, ceramics and metal; metal-working machines and machine tools and replacement parts thereof included in this class