| http://www.w3.org/ns/prov#value | - DESCRIPTION OF THEDRAWING The above and other objects, features and advantages of the present invention will become more readily apparent from the following description, reference being made to the accompanying drawing, in which: FIG. 1 is a side-elevational view of a rotating segment, according to the present invention, of a roller head; FIG. 2 is a plan view thereof; FIG. 3 is a vertical elevati
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