| http://www.w3.org/ns/prov#value | - wer side thereof and has engagement the claw portions on the circumferential edge of the lower side thereof in such a manner as to appear and disappear for engagement with and disengagement from the cut-out portions, the engagement claw portions being made to appear and disappear in association with engagement and disengagement of the fitting portion in and from the opening, whereby the handle por
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