실드금속아크용접 (SMAW; Shielded Metal Arc Welding), 피복아크용접, 탄소아크용접
불활성가스금속아크용접 (GMAW; Gas Metal Arc Welding = MIG;Matal Insert Gas Welding, Solid Wire Welding) 실드금속아크용접 (SMAW; Shield Metal Arc Welding, 피복아크용접) ★ 탄소아크용접 (CAW; Carbon Arc Welding) 용제-코어
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