improving combustion of {HEAD ~ petroleum fuels}, and increasing {TAIL ~ the heat transfer coefficient} of heating and cooling water 
improving combustion of { HEAD ~ petroleum fuels } , and increasing { TAIL ~ the heat transfer coefficient } of heating and cooling water
OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH