摘要 |
<p>PROBLEM TO BE SOLVED: To reduce foozle at the shot and to enable to hit the ball with the shot face with higher certainty and accuracy. SOLUTION: The trunk 41 is internally provided with a trapezoidal heap 411 whose cross section is laterally symmetric at the bottom side so that flesh thickness of the outer shell becomes thicker at the bottom side than upper side to give lower setting of the centroid position of the head 4 deviating toward the bottom. Owing to this, the sweet spot on the hitting face 42a of the plug body 42 comes to a position a little below the center of the hitting face 42a.</p> |