| 摘要 |
A golf ball having a plurality of recessed dimples in the surface thereof, wherein at least 90% in number of the dimples have a value of Vo in the range defined by the following equation: 0.35</=Vo</=0.47 wherein Vo is the volume of each dimple confined below a plane defined by the dimple edge divided by the volume of a cylinder whose bottom is defined by said plane and whose height is defined by the maximum dimple depth from the bottom: and the total volume ration Vr of the dimples is defined by the following equation: Vr=Vs / (4 pi R3/3)x100 wherein Vs is the sum of the dimple volumes as defined above, and R is the radius of the ball in the range defined by the following equation: VRL-N/1500</=Vr</=VRU-N/1500 wherein VRL and VRU are defined below, and N is the number of the dimples and ranges from 400 to 600 both inclusive; Large sized two-piece ball: VRL=1.14, VRU=1.22, and Large sized thread-wound ball: VRL=1.18, VRU=1.26. |
