Apparatus wherein the work contacting and modifying element is adapted to either smooth a surface by friction or reduce a surface to powder or small fragments by a plurality of natural cutting edges.
(the work; contacting; ) (the work; modifying; element) (Apparatus; smooth; a surface) (Apparatus; reduce; a surface; by a plurality of natural cutting edges)
the work the work Apparatus Apparatus
contacting modifying smooth reduce
element
a surface
a surface by a plurality of natural cutting edges