http://www.w3.org/ns/prov#value | - In a case where an operator such as a doctor or an engineer conducts examination within the body cavity of a subject with use of the endoscope system 2, first, the overtube 23 is inserted through the insertion part 11 of the endoscope 4 in a state where the torque wire 22 is passed through the overtube 23, and the overtube 23 is attached to the insertion part 11.
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