WEN 100 · Welding EngineeringSession 1 · Hour 1 · What a weld isInstructor cue 액체였던 이음.90 minNow Open · 5 min left · next Demo한ENScriptBodyClearHour 1What a weld isHour 2Follow What a weld isHour 3Your turn · What a weld isHour 4Check What a weld isThis browser cannot play the film.CheckA joint that was liquid. Week 1: name, order, result. Then A joint that was liquid.