| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To obtain a shaft for a putter and a putter which has a feature that it bows smoothly in a regular rhythm from the butt to the tip and returns to its original position smoothly during a stroke, that is, which can give a ball a correct top spin easily. <P>SOLUTION: A shaft, the curvature curve of which increases monotonouly from the butt to the tip (that is, its bending rigidity decreases monotonouly), is provided. <P>COPYRIGHT: (C)2003,JPO</p> |
