| 摘要 |
<p>PROBLEM TO BE SOLVED: To obtain a soft hitting-touch. SOLUTION: The golf club head 1 has a face surface 2 striking a ball formed out of a metal material. The face surface 2 has a coarse face part 45 formed by making abrasive grains, made of ceramics with the average size of 0.3 to 2.0 mm, impinge onto the face surface 2.</p> |
