... quality welding of various butt joint, lap joint, fillet weld and circular weld, straight bead.l Use of 3,000 rpm ... used for overlapping and butt welding of fillet weld, butt weld and circular weld, straight weld in large and middle size companies.Technical ... used for overlapping and butt welding of fillet weld, butt weld and circular weld, straight weld in large and middle size companies.Technical ...