| 摘要 |
A Golfball has, on a surface thereof, a large number of dimples, wherein
a standard deviation of average diameters of all the dimples is equal to or less than 0.20 mm,
a ratio of the standard deviation of the average diameters of all the dimples relative to an average of average radii of all the dimples is equal to or less than 10%,
a standard deviation of areas of all the dimples is equal to or less than 1.40 mm 2 ,
a ratio of the standard deviation of the areas of all the dimples relative to an average area of all the dimples is equal to or less than 10%,
a radius variation range Rhmax of a dimple having a maximum radius variation range Rh among all the dimples is equal to or less than 1.8 mm,
a radius variation range Rhmin of a dimple having a minimum radius variation range Rh among all the dimples is equal to or greater than 0.25 mm, and
a difference between the radius variation range Rhmax and the radius variation range Rhmin is equal to or less than 1.4 mm. |
