The method 13 including providing a local enclosure in said space and containing said filter, and providing an opening through said liner to communicate with {HEAD ~ the filter} in {TAIL ~ said enclosure} 
in
The method 13 including providing a local enclosure in said space and containing said filter , and providing an opening through said liner to communicate with { HEAD ~ the filter } in { TAIL ~ said enclosure }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH 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