%% 
%%  A DANTE-Edition example
%% 
%%  Example 31-04-3 on page 640.
%% 
%%  Copyright (C) 2011 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
%% 
\documentclass[]{article}
\pagestyle{empty}
\setlength\textwidth{375.57637pt}
\setlength\parindent{0pt}

%
\usepackage[dvipsnames]{pstricks}
\usepackage{pst-node}
\definecolor{Bluea}{cmyk}{.2,0,0,0}
\definecolor{MonGris}{rgb}{0.8,0.8,0.8}
\definecolor{grisclair}{rgb}{0.85,0.8,0.8}
\definecolor{Copper}{cmyk}{0,0.9,0.9,0.2}
\def\lame{\psframe(0.5,2.5)}
\def\demilame{\psframe(0,1)(0.5,1.5)} % arrive au niveau de l'eau
\def\Pile{%
  \rput(-1.5,0){%
    \pscustom{%
      \psline(-1,2)(-1,0)
      \psellipticarc(0,0)(1,0.2){180}{0}
      \psline(1,0)(1,2)}
    \psellipse(0,2)(1,-0.2)
    \psellipse(0,1)(1,0.2)
    \psellipse[linecolor=blue,fillstyle=solid,fillcolor=cyan](0,1)(1,0.2)
    \begin{psclip}{\psset{fillcolor=Copper,fillstyle=solid}\rput(-0.75,0){\lame}}
      \psellipticarc(0,2)(1,0.2){180}{0}
      \psellipticarc[linecolor=blue](0,1)(1,0.2){180}{0}
    \end{psclip}%
    \pscustom[linestyle=none]{%
      \psline(-1,1)(-1,0)
      \psellipticarc(0,0)(1,0.2){180}{0}
      \psline(1,0)(1,1)
      \psellipticarc(0,1)(1,0.2){0}{180}
      \fill[fillstyle=hlines,hatchcolor=cyan,hatchsep=0.3\pslinewidth,hatchwidth=0.1\pslinewidth]}
    \rput(-0.75,0){{\psset{linestyle=none,fillcolor=Copper,
fillstyle=solid}\demilame}\psline(0,1)(0,2.5)(0.5,2.5)(0.5,1)}
    \uput[180](-0.75,2.5){Cu}}
%
  \rput(1.5,0){%
    \pscustom{%
      \psline(-1,2)(-1,0)
      \psellipticarc(0,0)(1,0.2){180}{0}
      \psline(1,0)(1,2)}
    \psellipse(0,2)(1,-0.2)
    \psellipse(0,1)(1,0.2)
    \begin{psclip}{\psset{fillcolor=lightgray,fillstyle=solid}\rput(0.25,0){\lame}}
      \psellipticarc(0,2)(1,0.2){180}{0}
      \psellipticarc(0,1)(1,0.2){180}{0}
    \end{psclip}
    \pscustom[linestyle=none]{%
      \psline(-1,1)(-1,0)
      \psellipticarc(0,0)(1,0.2){180}{0}
      \psline(1,0)(1,1)
      \psellipticarc(0,1)(1,0.2){0}{180}
      \fill[fillstyle=hlines,hatchcolor=gray,
        hatchsep=0.3\pslinewidth,hatchwidth=0.1\pslinewidth]}
    \rput(.25,0){{\psset{linestyle=none,fillcolor=lightgray,
      fillstyle=solid}{\demilame}}\psline(0,1)(0,2.5)(0.5,2.5)(0.5,1)}
    \uput[0](0.75,2.5){Zn}}%
}


\begin{document}
\begin{pspicture}(-5,0)(5,4.5)
  \psset{dimen=middle}
% le dessin du pont
  \psline[linearc=0.2,doubleline=true,doublesep=1mm](-0.75,0.5)(-0.75,2.5)(0.75,2.5)(0.75,0.5)
  \Pile
  \psline(-2,2.5)(-2,4)(2,4)(2,2.5)
  \psframe[fillstyle=solid](0,3.8)(1,4.2)
  \pscircle[fillstyle=solid](-1,4){0.4}
  \rput(-1,4){A}
  \uput{0.5cm}[155](-1,4){$+$}
  \uput{0.5cm}[25](-1,4){$-$}
% les parties visibles du pont
  \psline[linearc=0.2,doubleline=true,doublesep=1mm](-0.75,2)(-0.75,2.5)(0.75,2.5)(0.75,2)
  \psline[doubleline=true,doublesep=1mm](-0.75,1)(-0.75,1.3)
  \psline[doubleline=true,doublesep=1mm](0.75,1)(0.75,1.3)
\end{pspicture}
\end{document}