| 摘要 |
PURPOSE: An aluminum baseball bat is provided to improve the elasticity of the aluminum baseball bat. CONSTITUTION: An aluminum baseball bat comprises a handle unit, a body unit which is formed with a hanging protrusion, an end cap(20) which is formed with an insertion protrusion on the outer periphery, a plurality of impact absorbing holes(30) which is formed in a connection unit, and a cylindrical reinforcing material(40) which increases elasticity about the connection unit. |
