| 摘要 |
<p>The supply hopper leads to a channel between a guide surface and a toothed wheel driven by an electric or pneumatic motor. It moves the balls from the hopper up to an ejection opening. - The access to the channel has retractable arms (100), controlled by wires (14) suspended from a net, that are joined to a cross bar (107) of the arms. They make the arms move, either by an electric signal or mechanical movement, when a ball hits the net so that only one ball is allowed into the channel at a time.</p> |
