In {TAIL ~ a second dual bed} adsorber 18, {HEAD ~ the gaseous stream} is contacted with a bed of LiAgX adsorbent under the conditions described above 
In
In { TAIL ~ a second dual bed } adsorber 18 , { HEAD ~ the gaseous stream } is contacted with a bed of LiAgX adsorbent under the conditions described above
REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH