| 摘要 |
Device for reducing the sail area by winding around a mast and clamping with a collar. According to the invention, two cables 3, 4 are stretched between the head 1 and the foot 7 of the mast M, the sail 9 passing between the cables 3, 4, the boom 10 being securely fastened to the mast M by means of the collar C. Applications: sailboards. <IMAGE>
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