| 摘要 |
PURPOSE:To enable a record medium to be recorded and repetitively used, if necessary, in a mode that the total amount of mediums in a plurality of games can be confirmed at any time by a player and troubles due to a plurality of records can be prevented. CONSTITUTION:The number of pinballs in the first game, a bar code 63 including the data, date, time and image 9 of driving license of automobile are written by a thermal head in a record card 8 having the optical property in the room temperature altered reversibly by a just previous heat treatment mode. The number of balls in and after the second game is added every time to the total number of balls previously read from the bar code 63 to rewrite the number of balls and bar cords 63. When the balls are exchanged for a premium, the total number of balls is read from the bar code 63 and the number of balls, date, time, bar code and image 9 of driving license of automobile are erased by the thermal head. |
