| 摘要 |
Golf ball 2 has dimples A having a diameter of 5.15 mm, dimples B having a diameter of 5.00 mm, dimples C having a diameter of 4.60 mm, dimples D having a diameter of 4.50 mm, dimples E having a diameter of 4.20 mm, dimples F having a diameter of 4.10 mm, dimples G having a diameter of 3.90 mm and dimples H having a diameter of 3.00 mm. Mean value of the diameter of all the dimples 8 is equal to or greater than 4.00 mm. Standard deviation eta of the diameter of all the dimples 8 is 0.52 or greater and 0.72 or less. Occupation ratio of total area of the dimples in the surface area of the phantom sphere is equal to or greater than 75%.
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