Generators for wind turbines, wind turbine generator drive systems, parts of wind turbine generator drive systems; mill towers and mill masts, blades, blade hubs, milling machines, machine beds, rotation devices, yaw rings and gears; devices for setting the pitch of the wings, brakes and brake devices, main shafts, universal joints, transmission devices, clutches and electric generators and reserve wind power supply plants; parts for the aforesaid goods