... quality welding of various butt joint, lap joint, fillet weld and circular weld, straight bead.l Use ... Can be used for overlapping and butt welding of fillet weld, butt weld and circular weld, straight ... quality welding of various butt joint, lap joint, fillet weld and circular weld, straight bead.l Use ... Can be used for overlapping and butt welding of fillet weld, butt weld and circular weld, straight ...