The partitioning 25 simultaneously forms {HEAD ~ a limit} to {TAIL ~ the perforated section} 19 
to
The partitioning 25 simultaneously forms { HEAD ~ a limit } to { TAIL ~ the perforated section } 19
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH