7 Wind mills and wind turbines, including off shore wind mills and wind turbines; parts and accessories for wind mills, namely, generators, gearboxes, rotors, wind turbine blades, bearings, transformers, wind turbine shafts, nacelles, wind turbine tower sections, yaw drives, hydraulic stations, hydraulic pumps, hydraulic motors, electric motors, yaw gears, hubs, blade bearings, including those for use in mill towers and nacelles being mill housings; cranes, including cranes for erection, repair and maintenance of wind mills and wind turbines on shore as well as off shore; self-propelled cranes; fixed cranes; grippers for cranes; parts and accessories for cranes, namely, winches, wire hoists and fastening devices specially adapted for use with movable cranes; generators for wind turbines being electrical power supplies for cranes installed on wind mills or wind turbines and for use in connection with repair and maintenance of wind mills and wind turbines