Gas or liquid shrouding of gas streams in {TAIL ~ the treatment system} may be provided by {HEAD ~ high efficiency inlet structures} 
Gas or liquid shrouding of gas streams in { TAIL ~ the treatment system } may be provided by { HEAD ~ high efficiency inlet structures }
OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD