The combustion gases generated during the combustion are collected and purified in {TAIL ~ a separating member} by separation of solid material from {HEAD ~ the combustion gases} 
The combustion gases generated during the combustion are collected and purified in { TAIL ~ a separating member } by separation of solid material from { HEAD ~ the combustion gases }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD