{HEAD ~ The roller frame assembly} includes {TAIL ~ at least one idler wheel} and a number of guide rollers 
includes
{ HEAD ~ The roller frame assembly } includes { TAIL ~ at least one idler wheel } and a number of guide rollers
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH