Also, {HEAD ~ a portion} of the atmosphere within the chamber 54 can be purged from the chamber 54, and an atmosphere having a lower moisture content can be introduced into {TAIL ~ the chamber} 54 
Also , { HEAD ~ a portion } of the atmosphere within the chamber 54 can be purged from the chamber 54 , and an atmosphere having a lower moisture content can be introduced into { TAIL ~ the chamber } 54
OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH