The washable filter materials that may be used in the present invention allows for {HEAD ~ reduced costs} of {TAIL ~ operation} and maintenance 
of
The washable filter materials that may be used in the present invention allows for { HEAD ~ reduced costs } of { TAIL ~ operation } and maintenance
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 OTH OTH