This class includes: - manufacture of internal combustion piston engines, except motor vehicle, aircraft and cycle propulsion engines: * marine engines * railway engines - manufacture of pistons, piston rings, carburetors and such for all internal combustion engines, diesel engines etc. - manufacture of inlet and exhaust valves of internal combustion engines - manufacture of turbines and parts thereof: * steam turbines and other vapour turbines * hydraulic turbines, waterwheels and regulators thereof * wind turbines * gas turbines, except turbojets or turbo propellers for aircraft propulsion - manufacture of boiler-turbine sets - manufacture of turbine-generator sets
This class excludes: - manufacture of electric generators (except turbine generator sets), see 2710 - manufacture of prime mover generator sets (except turbine generator sets), see 2710 - manufacture of electrical equipment and components of internal combustion engines, see 2790 - manufacture of motor vehicle, aircraft or cycle propulsion engines, see 2910, 3030, 3091 - manufacture of turbojets and turbo propellers, see 3030