{HEAD ~ The emulsion flow path} is through {TAIL ~ 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 the bottom of the zones 
{ HEAD ~ The emulsion flow path } is through { TAIL ~ 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 the bottom of the zones
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL 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 OTH OTH OTH OTH