The heating temperature of the electrical heating wires 22 is set to a temperature below the melting point of {HEAD ~ the glass} constituting {TAIL ~ the cathode ray tube} and a temperature which causes quick heat strain locally in the glass 
constituting
The heating temperature of the electrical heating wires 22 is set to a temperature below the melting point of { HEAD ~ the glass } constituting { TAIL ~ the cathode ray tube } and a temperature which causes quick heat strain locally in the glass
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 REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH