The AM-50 is a bridging system bridging system developed in Czechoslovakia. Up to eight sections can be linked together to cross wide rivers. The bridge is carried on a Tatra 813 cross-country truck that also can deploy the bridge.
The Czech Army has a
short article about the AM-50. And there is a Flickr photostream of
truck in action.
This item consists of two trucks carrying the bridges plus two deployed bridge sections. A model of
a truck deploying a bridge section is also available.
Other Warsaw Pact engineering equipment can be found at
Luke Ueda Sarson's shop