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http://zsj.jstage.jst.go.jp/cgi-bin/fs.cgi/17_561.pdf?SID=57853c5b41255cc967603abca854730f
http://zsj.jstage.jst.go.jp/cgi-bin/fs.cgi/17_561.pdf?SID=57853c5b41255cc967603abca854730f