| 摘要 |
<p>The catapult comprises a frame with a handle fixed to it, while an elastic band launches non-oblong projectiles and is attached to the frame at two points which are space apart above the handle. A component (15) is provided, pivoting in a vertical plane on the catapult frame (10) to adjust the position of the points at which the elastic band (30) is attached to it. This keeps these two points in a plane parallel to the ground when the handle (11) is not upright.</p> |
