... Sealed slip ring, no cable twist;6. Streamline design.7. Long acting anticorrosive treats, no corrosion in 15years.Pitch controlled ... 5. Sealed slip ring, no cable twist;6. Streamline design.7. Long acting anticorrosive treats, no corrosion in 15years. Pitch ... aerodynamics, start mechanical brake to stop wind turbine.Rotor Diameter (m)7.2Material and number of the bladeFiber-glass Reinforced * 3Rated ...