| http://www.w3.org/ns/prov#value | - contact of said arms on said edge as the arms cross said edge in moving in said one direction, applying a force on said arms of such direction to tend to hold and move them together during such movement of said arms as an assembly in said one direction so that said camming is against said force and so that the arms frictionally engage said marginal edge portion and opposite side faces of the disk
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