More specifically, {TAIL ~ the invention} is in the field of removal of vinyl halides from {HEAD ~ gas streams} 
More specifically , { TAIL ~ the invention } is in the field of removal of vinyl halides from { HEAD ~ gas streams }
OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD