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2. 2) Report issued by JSCE 63-2 Committee, Boshoku-Gijutsu (presently Zairyo-to-Kankyo), 39, 641 (1990).
3. 3) G. Nakayama, M. Akashi, W. Oshikawa and M. Itomura, Proc. Materials and Environments 2000, p.251, JSCE (2000).
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