| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a ball game bat having an improved repulsion at a ball hitting portion. <P>SOLUTION: A repulsion member 6 formed of a hollow elastic material is wound in tightly close state on the whole length of the ball hitting portion C of a core material 2, and the outer peripheral surface thereof is covered with an inner elastic internal pipe 5 and an outer pipe 7. <P>COPYRIGHT: (C)2005,JPO&NCIPI</p> |
