%info@http:://golem.fjfi.cvut.cz/wiki/root/GW4reports

\def\figwdescr#1#2{\GWig{width=\tw}{Infrastructure/Preionization/Thermoemission/ElectronGunUpper/gallery/0413Instalation/resized800/#1}\\ \centering \tiny{#2}\\~\\}
\def\GWslide{\slide{Preionization}{
\def\lngth{0.33\tw}
\begin{center}
\begin{columns}[c]
\column{\lngth}
\figwdescr{}{}
\column{\lngth}
\figwdescr{}{}
\column{\lngth}
\figwdescr{}{}
\end{columns}
\end{center}
}}