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