| 摘要 |
A two-wheel cricket bowling machine comprises upper and lower counter-rotating drive wheels (1A, 1B) which are independently driven with a speed differential and with a mutual angular offset about a common vertical axis (Al) to achieve the spin required to project a cricket ball (3) with a full range of cricket deliveries. The drive wheels and associated mountings are carried on opposite sides of a tiltable turnable rectangular frame (F). |
