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Priority to JP9031788UpriorityCriticalpatent/JPH0336533Y2/ja
Publication of JPH0211172UpublicationCriticalpatent/JPH0211172U/ja
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Publication of JPH0336533Y2publicationCriticalpatent/JPH0336533Y2/ja
ISLAND OF UNDERGROUND MACHINES, GAME ROOM FLOOR ON WHICH SUCH AN ISLAND OF MACHINES IS INSTALLED, AND MATERIAL IN BLOCKS USED FOR COVERING SUCH A FLOOR.