| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To increase the carry of a hit ball by reducing the back spin amount of the ball. <P>SOLUTION: This wood type golf club head 1 provided with a face 2 for hitting a ball and having a loft angle of 30°or less, has a plurality of face grooves 8 extending in the toe-heel direction on the face 2 and having the depth of 0.200-0.508 mm, and a plurality of auxiliary grooves 9 having the depth of 0.005-0.025 mm. <P>COPYRIGHT: (C)2008,JPO&INPIT</p> |
