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