{HEAD ~ The apparatus} has two dewatering stages a preliminary evaporating stage and a residual evaporating stage, a conversion stage and {TAIL ~ a cooling stage} 
has
{ HEAD ~ The apparatus } has two dewatering stages a preliminary evaporating stage and a residual evaporating stage , a conversion stage and { TAIL ~ a cooling stage }
HEAD HEAD HEAD HEAD HEAD HEAD REL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL