{HEAD ~ a source} of {TAIL ~ octenol}, separate from the canister containing carbon dioxide, provided in the housing 
of
{ HEAD ~ a source } of { TAIL ~ octenol } , separate from the canister containing carbon dioxide , provided in the housing
HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH