| 摘要 |
<p>A cue ball (10), suitable for practice purposes, into which a circular hole (22) is drilled and the core material removed therefrom. The core material is then replaced with a circular level (18). Perpendicular to the circular level is a pattern (16) which allows for, or directs placement of, the cue tip upon the ball (10). As a result, the invention provides a user with a basic target area for developing english or spin upon the ball (10). The leveling device (18) allows the user to position the ball (10) in the same position, presenting the target area (16) to the user in a repeatable manner.</p> |
