The press arm forces both the inner and outer beads of said tire within said second angular sector to pass one of {HEAD ~ the inner or outer beads} retaining {TAIL ~ flanges} of said wheel 
retaining
The press arm forces both the inner and outer beads of said tire within said second angular sector to pass one of { HEAD ~ the inner or outer beads } retaining { TAIL ~ flanges } of said wheel
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH