1. (3) Fujiyoshi, S. and Kobayashi, A., Foundamental Reseach of Friction Welding, Report of Faculty and Science of Meijo Univ., (1976).
2. (4) Fujiyoshi, S., Kobayashi, A., Kubo, K. and Hirai, Y., Foundamental Reseach of Friction Welding (2nd Report), Report of Faculty and Science of Meijo Univ., (1979).