{TAIL ~ The grain column} includes a left lateral discharge sidewall, a right lateral discharge sidewall, a lower discharge surface and an upper discharge surface which collectively define {HEAD ~ a discharge opening} 
{ TAIL ~ The grain column } includes a left lateral discharge sidewall , a right lateral discharge sidewall , a lower discharge surface and an upper discharge surface which collectively define { HEAD ~ a discharge opening }
TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD