| 摘要 |
A separate water board having a volume varying unit, according to the present invention, remarkably increases buoyancy when the water board is used on the water through the widening of the inner area of the water board by forming multiple corrugated tube units between a pair of boards horizontally divided, and forming elastic parts to be lifted up and down inside the divided boards, and enables the safe use thereof on the water and the easy loading thereof in a vehicle by remarkably reducing the area of the water board through the reduction of the inner area of the water board when the water board is loaded in a vehicle. |
