\documentclass[]{jsbook}
\usepackage{psfrag,graphicx,color,defvar2,eclepsf,othermac}
\pagestyle{empty}
\begin{document}
\begin{center}
\psfrag{ra}[][]{$r_a$}
\psfrag{1-ra}[][]{1--$r_a$}
\psfrag{rb}[][]{$r_b$}
\psfrag{1-rb}[][]{1--$r_b$}
\psfrag{ef1}[][]{$e_{f1}$}
\psfrag{Vt1}[][]{$V_{t1}$}
\psfrag{ef2}[][]{$e_{f2}$}
\psfrag{Vt2}[][]{$V_{t2}$}
\includegraphics[width=0.8\figbasewidth,clip]{eps-si/dualsystem1.eps}
%% system1, system2, ef1, ef2, Vt1, Vt2 $B$r5-F~(B %%%%%%%%%%%%%%
\end{center}
\end{document}
