| 摘要 |
PROBLEM TO BE SOLVED: To provide a mahjong ball game machine wherein the input operation of identification information (password) is extremely facilitated utilizing an existing input means. SOLUTION: In the mahjong ball game machine, the operation unit (button switch or the like) of an existing tile discarding operation is configured so as to be used as the input means of the identification information (password). COPYRIGHT: (C)2009,JPO&INPIT
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