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Una balsa neumática perfeccionada, caracterizada por llevar asociada una quilla constituida por al menos un tubo (8), firmemente unido a la cara exterior del fondo (4) de la balsa en sentido longitudinal y adaptado para ser hinchado con aire, gas o agua a presión hasta que quede lo suficientemente fuerte para que haga las veces de quilla de materia rígida.