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