{HEAD ~ The emulsion flow path} is through successive horizontal emulsion preheating, direct heating, post heating and settling zones of the tank while removing vapor from the top of the zones and water from {TAIL ~ the bottom} of the zones 
{ HEAD ~ The emulsion flow path } is through successive horizontal emulsion preheating , direct heating , post heating and settling zones of the tank while removing vapor from the top of the zones and water from { TAIL ~ the bottom } of the zones
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD 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 OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH