| http://www.w3.org/ns/prov#value | - A loudspeaker 21 for presenting sound effects is provided in the middle of the upper surface slightly sloped downward to the front, i.e. in a position closer to the game player than the loudspeakers 12, and a gun unit 22 simulating a gun as a game controller is provided in a specified position near the loudspeaker 21 via a cord 23 as a transmission line for control signals, etc.
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