| 摘要 |
<p>An aquatic apparatus includes a fin connected to a bottom of the an aquatic device; a flap connected to the fin, where the flap is connected at a leading end of the flap to the fin by one or more connectors, where the connectors enable the flap to rotate according to water current; one or more cables connected to a trailing end of the flap, where each cable of the one or more cables connects the flap the fin; the one or more cables are of a predetermined length to enable the flap to open and close.</p> |
