The Presflo cement hopper wagon, OO scale. The concrete mixing works. 

Introducing the presflo hopper cement wagon of British Railways. It uses the concept of pressure fluidization of cement to make it easier to carry. Cement becomes a fluid like powder under 20Psi pressure.
See how the concrete mixing plant works and how the cement is extracted from the hopper car.
#modelrailwayscene #modelrailwaylayout #cement works #presflo wagon #weathering

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