1. 1) H. Suzuki and K. Hayashi: Trans. JIM, 16 (1975), 353.
2. 2) H. Suzuki, K. Hayashi, M. Fukuda, T. Tanase and F. Nakayama: J. Japan Soc. Powder and Powder Met., 22 (1975), 226 (in Japanese).
3. 3) H. Suzuki and T. Tanase: Planseeber. Pulvermet., 24 (1976), 271.
4. 4) H. Suzuki, K. Hayashi and Y. Taniguchi: Planseeber. Pulvermet., 25 (1977), 94.
5. 5) H. Suzuki, K. Hayashi and Y. Taniguchi: Annual Report of Eng. Res. Inst. Fac. of Eng. Univ. of Tokyo, 36 (1977), 223 (in Japanese).