| http://www.w3.org/ns/prov#value | - Examples of such fit-in protrusion parts include, one having a male screw part on an outer circumference part, which is to be screwed in and held in a holder having a holding hole with a female screw and being provided on a sole of footwear, and one having a fit-in and holding mechanism other than a screw (when the fit-in protrusion and the holder being provided on the sole of footwear are provide
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