| 摘要 |
PROBLEM TO BE SOLVED: To provide a slot machine capable of detecting the presence of an object from a feeding port regardless of the state of a game medium sorting device, accurately preventing fraudulent actions, and accurately detecting the presence of a foreign matter without troubling a player or a manager or the like when it is discriminated that medals are retained. SOLUTION: When it is discriminated that game media are retained on the basis of presence signals, monitoring of whether or not an object to be detected is present is inhibited. COPYRIGHT: (C)2007,JPO&INPIT
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