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