| 摘要 |
V-shaped bottom (94) for fast motorboats (90) that presents a number of longitudinal means substantially parallel and symmetrical to the keel having walls that react to the lateral thrust from the water-air mixture, formed either of grooves (15, 18, 91, 92) or of ribs, their sides being widely curved at the junction respectively with the base of the grooves (15, 18, 91, 92) and with the surface of the bottom (94) of the boat.
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