| 摘要 |
A golf ball having dimples on its spherical surface, the dimples close to each pole being smaller in volume than those close to the parting line while maintaining total effectiveness of dimple volume substantially equal in relation to a first axis passing through the center of the ball defining a pair of poles and to a second axis passing through the center of the ball perpendicular to the first axis, so as to minimize variations in the aerodynamic characteristics of the ball despite changes of the axis of rotation. The effectiveness of dimple volume means a product obtained by multiplying the volume of a dimple by the sine value of an angle made by a radius from the center of the ball to the center of that dimple and the first or second axis of the ball. |
