The sheet 24 is placed in {TAIL ~ a sheet handling system} 26 which hold {HEAD ~ the sheet} under tension 
The sheet 24 is placed in { TAIL ~ a sheet handling system } 26 which hold { HEAD ~ the sheet } under tension
OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH