Every four hours starts a 5130-metric-tons iron-ore train in Rotterdam-Maasvlakte to the Dillinger Hütte (blast-furnance) in Saarland. It contains only waggons of types Faals 150, Faals 151, Falrrs 152 and/or Falrrs 153. All these cars owns automated couplers, so in Germany the trains are hauled only by class 151 AK. But this locos are unable to ride into the Nederlands and Railion NL do not own locomotives with automated couplers. As adapter between the needed three class 6400 locomotives by Railion NL and the heavy-wight trains are used old F-cars with standard-coupler at one side and an automated one at the other side. Here an example: Railion NL 930 0 623 in Venlo on 24th of February 2008. If I deciphers correct the type is written as "Uas" (?). The adapter-cars looks very different, some with high board like here, some without it. But on all cars for this purpose are unmounted the flaps on the sides.
Photo ©Arnim v. Herff