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