Thus, there is never {HEAD ~ a possibility} of the raw edge of opening 16 of paperboard panel 12 contaminating {TAIL ~ the liquid} 
Thus , there is never { HEAD ~ a possibility } of the raw edge of opening 16 of paperboard panel 12 contaminating { TAIL ~ the liquid }
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL