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