In still another aspect, this invention relates to {HEAD ~ substrates} that are treated with {TAIL ~ fluorochemical compounds} 
In still another aspect , this invention relates to { HEAD ~ substrates } that are treated with { TAIL ~ fluorochemical compounds }
OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL