| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a golf club head capable of suppressing significant reduction of the quantity of back spin of a ball shot from the rough. <P>SOLUTION: A plurality of score lines are formed on the face surface of the golf club head. The golf club head has a stair-like shape with a plurality of stairs formed on the side wall of each score line in the depth direction of the score line from an end on the face surface side of the side wall. <P>COPYRIGHT: (C)2010,JPO&INPIT</p> |
