| 摘要 |
<p>A golf ball dimple (A), formed on the spherical surface of a golf ball, being polygonal in the surface configuration thereof and having a double slope (c,d) in the sectional configuration thereof. The gradient (r1) of one slope (c) disposed in the vicinity of an edge of the dimple is greater than that (r2) of the other slope (d) disposed in the vicinity of the bottom thereof so that the dimple has a plane having a large angle with respect to an air flow in the periphery of the golf ball. <IMAGE> <IMAGE></p> |
