Cartridge 24 preferably includes a lip seal that prevents {HEAD ~ ingress} of dust into {TAIL ~ the cartridge} 
into
Cartridge 24 preferably includes a lip seal that prevents { HEAD ~ ingress } of dust into { TAIL ~ the cartridge }
OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL