... *520655*330*560 IGBT ZX7-ST MMA Series IGBT arc welder For power construction, petrochemical construction, pressure vessel, ... arc welding two processes 2. Easy arc, arc stability, weld pool and easy control 3. Welding with self-locking / non-self-locking 4. Digital ... : carbon steel, stainless steel welding. Excellent dynamic characters, arc stability, welding forming good. 3.This machine can perform to ...