28.110Level 528.11Manufacture of engines and turbines, except aircraft, vehicle and cycle engines28.11001Manufacture of internal combustion piston engines and parts thereof for various uses: for rail vehicles, agricultural machines or heavy-duty construction machinery, ships and boats28.11002Manufacture of turbines and parts thereof: turbines generating steam or other vapour, gas turbines, hydraulic turbines, water wheels and regulators thereof28.11003Manufacturing cylinder heads, connecting rods, pistons, rings, etc.