| 摘要 |
A windmill includes a supporting frame, a vertical transmission shaft rotatably mounted in the supporting frame, a plurality of fan blades, each having two bending edges longitudinally formed on the two vertical edges of the blade, horizontally pivotedly mounted on the vertical transmission shaft, a sweeping cleaner formed on the lower portion of the transmission shaft to remove the snow or dirts on a power generator, a power generator formed on the lower end of the transmission shaft, and a high-speed braking clutch automatically braking the rotation of the transmission shaft under stronger wind pressure for safely protecting the power generator.
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