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