{HEAD ~ Gases} that are produced during this transformation are removed by {TAIL ~ way} of gas flue 6 
{ HEAD ~ Gases } that are produced during this transformation are removed by { TAIL ~ way } of gas flue 6
HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH REL REL REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH