| 摘要 |
<p>PROBLEM TO BE SOLVED: To improve the tensile strength of the face. SOLUTION: The golf club head 1 has a face member 7 made of a rolled material provided in the face 2 to strike a ball and the face member 7 includes a high rolled potion 7a whose draft is high and a low rolled portion 7b whose draft is lower than the high rolled portion 7a.</p> |
