{HEAD ~ Furnace} has a melting section and a withdrawal section bounded by side walls of refractory material which extend to a glass outlet formed by {TAIL ~ an overflow edge} remote from the melting section 
{ HEAD ~ Furnace } has a melting section and a withdrawal section bounded by side walls of refractory material which extend to a glass outlet formed by { TAIL ~ an overflow edge } remote from the melting section
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 TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH