Combustion chamber slag, {HEAD ~ cleanse} from heavy metals and not burned out fuel in {TAIL ~ slag} of heat power station, cool by air, which is then used in combustion chamber 
Combustion chamber slag , { HEAD ~ cleanse } from heavy metals and not burned out fuel in { TAIL ~ slag } of heat power station , cool by air , which is then used in combustion chamber
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH