The cartridge can include {HEAD ~ one or more valves} that are biased in {TAIL ~ a closed position} to prevent odors from escaping the cartridge 
are biased in
The cartridge can include { HEAD ~ one or more valves } that are biased in { TAIL ~ a closed position } to prevent odors from escaping the cartridge
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH