-
Minoru Takahashi
The Research Institute for Iron, Steel and Other Metals, Tohoku University
-
Denjiro Watanabe
The Research Institute for Iron, Steel and Other Metals, Tohoku University
-
Tatsuo K\={o}no
The Research Institute for Iron, Steel and Other Metals, Tohoku University
-
Shiro Ogawa
The Research Institute for Iron, Steel and Other Metals, Tohoku University