A machine for removing the ballast under the track seen west of Buir (on
Cologne-Aachen) on 20 April 2002. I think there is some kind of a chain running
around in these arms, taking the ballast from under the track and then bringing
it up on one side.
<p>
Digital photo by
<a href="http://www-users.rwth-aachen.de/christoph.schmitz2/index.html">Christoph Schmitz</a>