\documentclass[]{jsbook}
\usepackage{psfrag,graphicx,color,defvar2,eclepsf,othermac}
\pagestyle{empty}
\begin{document}
  \begin{center}
    \leavevmode
\epsfile[
\epsfat(50mm,50mm){\wbox{$B;0AjF14|H/EE5!(B}}
\epsfat(55mm,73mm){\wbox{$BD>N.EEF05!(B}}
%\epsfat(40mm,47mm){\wbox{3-phase synchronous generator}}
%\epsfat(55mm,73mm){\wbox{DC motor}}
]{file=eps-mg/mg-set2.eps,width=0.5\textwidth}
  \end{center}
\end{document}
