With {HEAD ~ door} 54 and cover 14 in {TAIL ~ their closed position}, as shown in FIG 3., a substantially air tight chamber 56 is formed in the interior of kiln 10 
With { HEAD ~ door } 54 and cover 14 in { TAIL ~ their closed position } , as shown in FIG 3 . , a substantially air tight chamber 56 is formed in the interior of kiln 10
OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH