WEN 100 · Welding EngineeringSession 2 · Hour 1 · The arcInstructor cue 빛, 열, 그다음 금속.90 minNow Open · 5 min left · next Demo한ENScriptBodyClearHour 1The arcHour 2Follow The arcHour 3Your turn · The arcHour 4Check The arcThis browser cannot play the film.CheckLight, heat, then metal. Week 2: name, order, result. Then Light, heat, then metal.