WGN 100 · Welding BasicsSession 2 · Hour 1 · The machineInstructor cue 불꽃 전에 스위치를 안다.90 minNow Open · 5 min left · next Demo한ENScriptBodyClearHour 1The machineHour 2Follow The machineHour 3Your turn · The machineHour 4Check The machineThis browser cannot play the film.CheckKnow the switch before the spark. Week 2: name, order, result. Then Know the switch before the spark.