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1 Kazuyuki Chihara and U.M.Rmith, AICHE Journal, 127(2),213(1981)
2 Wu Minghong, Bao Borong, Radiation Physics and Chemistry, 53,431(1998)
3 D. Wissel, E. Bochler, C. Scholze, L. Haldenwang, W. Huhn, P. Ott, A. Heger, H.Dorschner and B.Ihme, Patent Ger.(East) No. DD 218, 037 (1985)
4 M. Kitajiam, H. Fujitsuka and H. Shinno, J. Material Sci. Lett., 9, 19(1990)

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