Turbines; steam and other vapour turbines

840610 Turbines; steam and other vapour turbines, for marine propulsion 840681 Turbines; steam and other vapour turbines, (for other than marine propulsion), of an output exceeding 40MW 840682 Turbines; steam and other vapour turbines, (for other than marine propulsion), of an output not exceeding 40MW 840690 Turbines; parts of steam and other vapour turbines