| 摘要 |
<p>PURPOSE:To make it possible to obtain sufficient repulsive performance, etc., even if a player having a tendency to hit a ball with the left side or right side of a gut surface. CONSTITUTION:First and second boundary lines P1, P2 which pass the ends 14a, 14b in the minor axis X direction of the gut surface and are parallel with the major axis Y are set. The region held by the major axis Y and the first boundary line P1 is defined as the first region A1 and the region held by the major axis Y and the second boundary line P2 as the second region A2. The ratio m1/m2 between the mean value m1 of the length in the minor axis X direction of the mesh M formed by the intersected point of the gut K in the major axis Y direction the first region A1, and the jut J in the minor axis X direction and the mean value m2 of the length in the minor axis X direction of the mesh M in the second region A2 is set at >=0.2 to <=0.9.</p> |
