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