When this has been accomplished, the pan, and reducing agent remaining therein, is withdrawn, and {TAIL ~ a neutral atmosphere} will obtain in {HEAD ~ the kiln} 
When this has been accomplished , the pan , and reducing agent remaining therein , is withdrawn , and { TAIL ~ a neutral atmosphere } will obtain in { HEAD ~ the kiln }
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 TAIL OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD