Technician A says a non-contact thermometer is the only means used to monitor the temperature of the metal when applying heat. Technician B says plug welds are used to hold the insert into place when the two rails are aligned. Who is correct?
A. Technician A only
B. Technician B only
C. Both Technicians A and B
D. Neither Technician A nor B
B. Technician B only
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