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4. 4) Y. Kaneko, Y. Maekawa, S. Yamane, K. Oshima, "Numerical Simulation of Weld Pool in Switch Back Welding", Quar. J. JWS, 25-2, 372-380 (2007). (in Japanese)
5. 5) K. Aimi, Y. Mukai, H. Oyama, H. Nakata, W. Takahashi, T. Ikeda, A. Kawamoto, "Development of a Specialized Robot System in the Arc Welding", Proc. of IIW Commission XII, Doc. XII-1863-05 pp 103-108 (2005).