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Drum automatic welding machine is with welding roller frame, welding deflection machine combination, of component inside and outside circular seam, fillet weld, internal and external longitudinal seam automatic welding of special equipment, has the stationary type, rotary type, all position and so on the many kinds of structure form. According to the needs of users choose structure and supporting all kinds of welding machine and increase tracking, swing, monitoring, flux recovery of transportation and other auxiliary function, also can be used for users design and manufacture all kinds of special special welding equipment.