| 摘要 |
A sail comprises a number of pluralities of radial panels. Each panel comprises a pair of lengthwise parallel edges. Each of the pluralities is oriented to radiate from a corner of the sail. The panels of each plurality are oriented and angled to each other to converge near the corners, to overlap more of each other near the corners, to diverge away from the corners and to overlap less of each other away from the corners.
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