A Kies-Schotter-Einbaumaschine (machine to put ballast into the track) of the
track working company Wiebe being prepared for duty in Düren (on
Cologne-Aachen) on 29 April 2002. The blue part under the main frame is the leg
of a worker who takes a look inside.
<p>
Digital photo by
<a href="http://www-users.rwth-aachen.de/christoph.schmitz2/index.html">Christoph
Schmitz</a>