| 摘要 |
<p>The club head (20) has an underside with a curved surface (201), with an aperture (21) to accommodate an elastic sleeve (30) of rubber, to form a central point. The aperture is at a certain pitch, e.g. between 4 and 12[deg], and its width is slightly larger than the diameter of a golf ball (40). The club head has an inner side with a number of holes, to adjust the weight of the head. The holes are connected to the aperture.</p> |
