The grain dryer further includes {HEAD ~ a metering roll} positioned to contact {TAIL ~ grain} advancing out of the discharge opening of the grain column 
The grain dryer further includes { HEAD ~ a metering roll } positioned to contact { TAIL ~ grain } advancing out of the discharge opening of the grain column
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH