| 摘要 |
Sailboard or similar craft including a shaped hull 2 of elongate overall shape having a thickness which may vary from the front 3 to the back 4, characterised in that it comprises, in its lower face in contact with the surface of the water, at least one zone where the said face has an abrupt discontinuity 6, suitable for promoting a localised depression under the board in line with the said discontinuity as the board moves, with a thin layer of air bubbles being formed under the said board. <IMAGE>
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