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2. 4) N. OHASHI, T. IRIE, S. SATOH, O. HASHIMOTO, and I. TAKAHASHI : SAE paper No. 810027 (Feb. 1981)
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4. 7) F. YANAGISHIMA, Y. SHIMOYAMA, M. SUZUKI, H. SUNAMI, T. HAGA, Y. IDA, and T. IRIE : : Kawasaki Steel Technical Report (Mar. 1981) No. 2, p. 14