{TAIL ~ The heated air} then exits the grain dryer 10 through the outer perforated wall 34 in {HEAD ~ the general direction} of arrow 44  
{ TAIL ~ The heated air } then exits the grain dryer 10 through the outer perforated wall 34 in { HEAD ~ the general direction } of arrow 44
TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH