| 摘要 |
PROBLEM TO BE SOLVED: To prevent delay of supply of game media to a general game island by making the game island in a condition capable of sending the game media from a game media sending means to a game media guiding means when the lower tank content of a general island came to lower than a prescribe amount. SOLUTION: An island group comprises a special island 10 and plural general islands 20. General islands 20 are placed on both side of the special island 10. A game media sending means 110 is bridged over between the parent island, the special island 10, and other island, the general islands 20. The game media sending means 110 is for sending game media from the special island 10 to general islands 20. A special upper tank 130 and a special lower tank 140 are equipped on the special island 10. An upper game media detecting means 131 and a lower game media detecting means 141 for detecting game media are respectively equipped in the special island upper tank and the special island lower tank.
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