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3. Arc augmented laser processing of materials
4. 4) T. Hayashi, S. Katayama, N. Abe and A. Ohmori: High Power CO2 Laser—MIG Hybrid Welding Process for Increased Gap Tolerance - Hybrid Weldability of Thick Steel Plates with Square Groove (Report I) -, Quar. J. JWS, 21-4, (2003), 522-531 (in Japanese).
5. 5) T. Ishde, M. Nayama, M. Watanabe and T. Nagashima: Coaxial TIG-YAG & MIG-YAG Welding Methods, J. JWS, 40-4, (2001), 12-17 (in Japanese).