| http://www.w3.org/ns/prov#value | - FIG. 2A is a schematic diagram showing that a positional relation between an endoscope and a monitor of the observation system according to the first embodiment is observed from an arrow ?? direction in FIG. 1, a solid line shows a state in which the monitor is parallel to a floor surface and an insertion section of the endoscope crosses the floor surface at right angles, and a broken line shows a
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