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