WSC 110 · Welding ConstructionSession 4 · Hour 1 · Heat has a mapInstructor cue 열에도 지도가 있다.90 minNow Open · 5 min left · next Demo한ENScriptBodyClearHour 1Heat has a mapHour 2Hour two. Preheat.Hour 3Hour three. 20 mm T.Hour 4Hour four. Walk the halo.This browser cannot play the film.CheckTorch the T on 20 mm. Keep the cool under critical. Preheat in band. HAZ named.