{HEAD ~ The withdrawal section} is separated from {TAIL ~ the melting section} by a first dividing wall extending downwardly and terminating above the surface of the molten glass 
{ HEAD ~ The withdrawal section } is separated from { TAIL ~ the melting section } by a first dividing wall extending downwardly and terminating above the surface of the molten glass
HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH