| 摘要 |
<p>A game ball for throwing has a top hemisphere (12) provided with a plurality of apertures (16) which attract air into a hollow spherical shell (10). The bottom hemisphere (14) is of an imperforate nature, and is provided with a plurality of air channels (20) positioned parallel to and subsequently away from an equatorial line (22). When projected along the plane of the equatorial line (22), the ball will deviate from a normal trajectory in the direction of the axis of the bottom hemisphere (26).</p> |
