| 摘要 |
Two blades (1) are fixed to the sole (3) of a foot support by their axle (4). The blades are joined together by a hinge (2). Two stops (5) are fixed on each side of the sole to limit the movement of the blades. The blades are moved by the alternate movement of the legs and they are closed by the pressure of water. The blades are fixed to the foot of the user by a strap (6) and an ankle hold.
|
