Wind turbines; generators for wind turbines; furling apparatus for wind turbines; structural parts for wind turbines, namely, wind turbine towers and masts, turbine arms, turbine cores, turbine housings, machine bases, rotors and rotary mechanisms, turning rings and gears, blades, blade hubs, turbine tails; devices for rotating turbine arms, devices for setting the pitch of the blades, brakes and retarders, main axles, transmission components, couplings and electric generators; replacement pa...