Plasser & Theurer 09-32 CSM ballast tamper of Kölngleis working in the
area of the station Buir (on Cologne-Aachen) on 5 September 2001. There are
four pairs of tamping arms on each side, so in each step two sleepers can be
processed. The tamping device is shiftable lengthwards against the main frame,
so the machine itself moves continously (from right to left) while working.
<p>
Digital photo by
<a href="http://www-users.rwth-aachen.de/christoph.schmitz2/index.html">Christoph
Schmitz</a>