| 摘要 |
The invention relates to the wind-power engineering and can be used in the wind-power plants. A sector of the windmill blade includes a group formed of at least three pivoted vents (1, 2, 3) with horizontal axle (4), placed in a vertical row. The upper vent (1) is made of a material having a weight per unia of area twice or more times greater than the other vents (2, 3).
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