| 摘要 |
A training device for ball games includes a sloping surface having a forward edge flush with the floor or ground on which the training device is placed, and upstanding walls extending upward from the edges of the sloping surface except the forward edge thereof, the sloping surface including a simulated area of such a length that it can be estimated that a ball rolling upward on the sloping surface will never pass a target when the rolling ball stops up to the inner end of the simulated area.
|
