| http://www.w3.org/ns/prov#value | - When the end cap 611 is attached to the main part 610, an end face of the peripheral barrel 611 b of the end cap 611 abuts an end face of a cover layer 627 of an angle portion 602 b so as to prevent a conductive material such as a metal on the outer surface of the insertion unit 602 from being exposed.
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