| 摘要 |
<p>A portable scoring device for use with billiards or darts has windows for displaying the individual player's scores and press-buttons for enabling each player to enter his score as the game progresses. Provision is made for cancelling an incorrectly entered score and for changing the mode of operation so that the device subtracts newly entered scores, instead of adding them. The scores appear in illuminated form in the windows.</p> |
