| 摘要 |
Three legs (51, 52, 53) of strong fabric, of reduced elongation in relation to that of the fabric constituing the rest (6) of the sail, are arranged triradially according to a geometry delineating approximately curves with centres of curvature which are external to the sail (1), the said legs (51, 52, 53) ending in the angles (21, 22, 23) of the sail (1). <IMAGE>
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