Upon attainment of {HEAD ~ the desired lower temperature}, the reducing agent is introduced into the chamber on a body reduction pan composed of {TAIL ~ a high temperature stainless steel} or suitable refractory material 
Upon attainment of { HEAD ~ the desired lower temperature } , the reducing agent is introduced into the chamber on a body reduction pan composed of { TAIL ~ a high temperature stainless steel } or suitable refractory material
OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH