7 Machines, namely, electrical rotating, pneumatic, thermal or hydraulic machines for converting energy; aggregates, components and equipment forming an integral part of machines and serving as accessories especially adapted for machines for the physical, chemical, thermodynamic, electrical and/or electronic operation of power plants included in this class; machines for managing combined gas and steam power plants and parts and aggregates especially adapted for their construction included in this class; turbines other than for land vehicles; steam, hydraulic, wind turbines for power plants; centrifugal, circulating, compressed air pumps; air, axial flow, centrifugal compressors; gas turbines not for land vehicles; steam turbines; hydraulic turbines; electric generators; parts especially adapted for the aforesaid goods; cast precision building elements or forged parts as components of turbines or compressors, namely, stators and distributor rotors; machine parts, namely, combustion chamber wall housings, heat accumulation segments, namely, heat exchangers being parts of machines, diffuser segments, fluid conductors, labyrinth segments, and nozzles for gas turbines not for land vehicles; machine component parts, namely, turbine stator or armature segments; machine parts, namely, vanes, mobile or guide vanes for turbines or compressors; machine parts in the nature of auxiliary means of securing vanes to rotating or static modules on turbines or compressors included in this class; bearings being parts of machines; machine parts, namely, engine or motor air filter parts, engine muffler parts, crankcases for machines, and non-vehicle gas turbine equipment parts, namely, combustion chamber housings and exhaust gas housings; installations for exhaust gas extraction, injection nozzles, and installation or stop units for liquid or gaseous media in conjunction with the gas turbine installations all being parts of machines and included in this class