{TAIL ~ The reaction chamber} preferably has a multiplicity of ports, so that depending upon the particular stream, its BTU value, and other parameters, the appropriately spaced ports are selected as {HEAD ~ injection ports} 
{ TAIL ~ The reaction chamber } preferably has a multiplicity of ports , so that depending upon the particular stream , its BTU value , and other parameters , the appropriately spaced ports are selected as { HEAD ~ injection ports }
TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD