T tc φ0.3 E tc φ0.2 T tc φ0.1 / T tc φ0.3 E tc φ0.2 T tc φ0.1 _37 T tc φ0.3,E tc φ0.2,T tc φ0.1 / T tc φ0.3,E tc φ0.2,T tc φ0.1 T thermocouple φ0.1: 14V E thermocouple φ0.2: 9V T thermocouple φ0.1: 7V Spot Welder: HSW-03A Electrode: HSW-T1 HSW-FB2