In the preferred embodiment, plate 48 is composed of {HEAD ~ a refractory material} which conducts and reradiates {TAIL ~ heat} generated by heating elements 38 
conducts
In the preferred embodiment , plate 48 is composed of { HEAD ~ a refractory material } which conducts and reradiates { TAIL ~ heat } generated by heating elements 38
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH REL OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH