| 摘要 |
The invention relates to a device forming the blade of a multi-blade wind-driven wheel, each blade comprising a sail fixed to a framework made up of a central arm and a variable number of perpendicular crosspieces attached to this arm, the angle of inclination of each crosspiece being variable along the length of this arm so as to form a twisted sail; the whole of this device making it possible to improve the efficiency of the wind-driven wheel. <IMAGE>
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