{HEAD ~ A grain dryer} which includes {TAIL ~ a grain column} through which grain may flow is disclosed 
{ HEAD ~ A grain dryer } which includes { TAIL ~ a grain column } through which grain may flow is disclosed
HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH