In the lower part of the withdrawal section 1 of the glass melting furnace, {HEAD ~ the side walls} 2 and the bottom 2 are surrounded by {TAIL ~ the water jacket} 3 
In the lower part of the withdrawal section 1 of the glass melting furnace , { HEAD ~ the side walls } 2 and the bottom 2 are surrounded by { TAIL ~ the water jacket } 3
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH