| 摘要 |
A golf ball formed with half metal molds having stable flying ability without dispersion, regardless of hitting point on surface of the ball. A parting line is latitude 0 DEG , two pole portions are latitude 90 DEG , an area of which latitude is 0 DEG to 17 DEG is a parting line vicinity, an area of which latitude is more than 17 DEG and less than 62 DEG is a shoulder portion, an area of which latitude is 62 DEG to 90 DEG is a pole vicinity. And, when X represents total volume of dimples which belong to the parting line vicinity, Y represents total volume of dimples which belong to the pole vicinity, and Z represents total volume of dimples which belong to the shoulder portion, X/Z is set to be 0.58 to 0.72, Y/Z is set to be 0.22 to 0.30, and Y/X is set to be 0.35 to 0.48. |
