{HEAD ~ A support structure} is provided for {TAIL ~ the bending roller} to facilitate a movement thereof to effect not only a cylindrical bending of the strip material but also, and upon a swivelling of the bending roller, a cylindrical as well as an increasing diameter spiral can be formed 
is provided for
{ HEAD ~ A support structure } is provided for { TAIL ~ the bending roller } to facilitate a movement thereof to effect not only a cylindrical bending of the strip material but also , and upon a swivelling of the bending roller , a cylindrical as well as an increasing diameter spiral can be formed
HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH