| 摘要 |
A water floatation board includes a pair of curved side fins for an increase in holding power of the board when in the matter, and without increasing drag during board use. Each curved side fin has a concave surface that faces a centerline of the board, and a convex surface that is opposite of the concave surface. The inner and outer surfaces merge to form leading and trailing edges, and a fin tip. The use of the concave surface allows the fin area to increase without an increase in fin depth, thus providing greater holding power without increasing drag.
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