| 摘要 |
<p>A swing ball is provided. The provided swing ball includes: an attached module bonded to the wall of the indoor; a wire having one end to be combined to the attached module; and a ball module bonded to the other end of the wire. The present invention is to provide the swing ball to easily predict the trajectory of a ball and prevent the ball from being run out of a constant area by coupling the attached module to the ceiling of the indoor and connecting the attached module and the ball module with the wire.</p> |
