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