{HEAD ~ Desorption} of oxygen and {TAIL ~ inert gas} at opposite ends of the LiAgX bed allows the inert gas to be recovered with minimum oxygen contamination 
of
{ HEAD ~ Desorption } of oxygen and { TAIL ~ inert gas } at opposite ends of the LiAgX bed allows the inert gas to be recovered with minimum oxygen contamination
HEAD HEAD HEAD HEAD HEAD REL OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH