\begin{tikzpicture}
    \draw[thick] (-.5,-0.3) -- +(13,0);
    \draw[thick] (-.5,-3) -- +(13,0);
    \draw[thick] (-.5,-5) -- +(13,0);
    \drawallelements at (0,-0.3);
    \drawallelements[shift=0.5] at (0,-3);
    \drawallelements[shift=-0.5] at (0,-5);
    \node[anchor=east] at (-.8,-0.3){\texttt{shift=0}};
    \node[anchor=east] at (-.8,-3){\texttt{shift=0.5}};
    \node[anchor=east] at (-.8,-5){\texttt{shift=-0.5}};
    \pockelscell at (10.93,-0.3);
    \pockelscell[shift=0.5] at (10.93,-3);
    \pockelscell[shift=-0.5] at (10.93,-5);
\end{tikzpicture}
