Current research and development in bobbin tool Friction Stir Welding (FSW) for aluminum alloy panel extrusionYudha Eko Widyantono, Sigit Budi Hartono, Sudiana, Triyono and Nurul MuhayatE3S Web Conf., 688 (2026) 03004DOI: https://doi.org/10.1051/e3sconf/202668803004