| 摘要 |
PROBLEM TO BE SOLVED: To solve problems of an installation space for an operating means, time required for assembly, the complication of assembly, and cost increases of a game machine in a Pachinko ball game machine whose volume can be adjusted by a player. SOLUTION: Since one operating button 75 is alternately used for volume adjustment and change of details displayed, the installation space can be reduced and problems of assembly time, the complicating assembly and cost increases of a game machine are not involved. COPYRIGHT: (C)2006,JPO&NCIPI
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