| 摘要 |
A blade 1 is made of a thin strip which is curved throughout its size. Its upper half 1c above the center line x extending from the front end to the tail end 1b is bent at a front edge 1e in the direction of curve of the curved shape. Its lower half 1d below the center line x is bent at a front edge 1f in a reverse of the direction of curve of the curved shape. More particularly, the upper half 1c and the lower half 1d are not symmetrical about the center axis x. The upper half 1c and the lower half 1d are identical in the weight. Accordingly, the direction of spinning can be uniform. Also, the spinning action can start quickly and remain consistent when the retrieving action is slow.
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