| 摘要 |
PROBLEM TO BE SOLVED: To make full use of the capacity of a prize ball tank. SOLUTION: As the prize ball tank 95 is provided with a lid 96, balls never overflow even if supplied by an uncontrolled discharge system, and the capacity of the prize ball tank 95 is fully used. Therefore, delayed supply never occurs ad a variety of inconveniences due to delayed supply can be avoided.
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