{HEAD ~ The room air filter apparatus} 2 incorporates {TAIL ~ additional functional features} in other embodiments of the present invention 
incorporates
{ HEAD ~ The room air filter apparatus } 2 incorporates { TAIL ~ additional functional features } in other embodiments of the present invention
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH