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