| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To improve the degree of freedom of design of a baseball or softball bat having an elastic body in a ball hitting part. <P>SOLUTION: This baseball or softball bat 1 has a bat body 2 having a recessed part 2a in the ball hitting part, and the elastic body 3 including a first elastic body layer 3a installed in the recessed part 2a, having a specific gravity of 0.01 to 0.25 and having JIS C hardness of 3 to 80 and a second elastic body layer 3b for covering this first elastic body layer 3a and having hardness higher than the first elastic body layer 3a. <P>COPYRIGHT: (C)2006,JPO&NCIPI</p> |
