%% 
%%  Ein Beispiel der DANTE-Edition
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%%  7. Auflage
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%%  Beispiel 19-03-3 auf Seite 335.
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%%  Copyright (C) 2016 Herbert Voss
%% 
%%  It may be distributed and/or modified under the conditions
%%  of the LaTeX Project Public License, either version 1.3
%%  of this license or (at your option) any later version.
%% 
%%  See http://www.latex-project.org/lppl.txt for details.
%% 
%% 
%% ==== 
% Show page(s) 1
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\documentclass[]{exaarticle}
\pagestyle{empty}
\setlength\textwidth{145.16928pt}
\setlength\parindent{0pt}
%StartShownPreambleCommands
\usepackage{pstricks,pst-coil,pst-node}
%StopShownPreambleCommands
\begin{document}
\begin{pspicture}(4,3)
\cnode(0.5,0.5){0.5}{A}\cnode[fillstyle=solid,
  fillcolor=lightgray](3.5,2.5){0.5}{B}
\nccoil[coilwidth=0.4,coilaspect=35,%
  coilheight=0.5]{<->}{A}{B}
\end{pspicture}
\end{document}