Some oxygen 24 passes through and {HEAD ~ some oxygen} and {TAIL ~ xenon} and krypton are adsorbed and recovered during bed regeneration 
Some oxygen 24 passes through and { HEAD ~ some oxygen } and { TAIL ~ xenon } and krypton are adsorbed and recovered during bed regeneration
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH