The couplers between the tramcars 5104 (left) and 5102 (right) of the
Kölner Verkehrsbetriebe (KVB) seen at the station Thielenbruch on 29 June
2002. When not in use, the couplers are retracted and the covers are lowered to
close the noses.
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Digital photo by
<a href="http://www-users.rwth-aachen.de/christoph.schmitz2/index.html">Christoph
Schmitz</a>