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Patent US7735426 - Hopper cars with one or more discharge control
Drawings from the society’s archives and publications – the santa fe Patent us7735426 Dizzy's wanderings & wonderings: wondering about a r.r. icon.
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Hopper car diagramHopper train Patents hopper car claims covered drawingPatent us5259322.
Hopper publications coveredGrain and drain train .
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Grain And Drain Train - Best Drain Photos Primagem.Org
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3d train car
Diagram of covered hopper car by the Gouvernement du Canada
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Patent US5259322 - Five unit articulated covered hopper car - Google
Dizzy's Wanderings & Wonderings: Wondering About a R.R. Icon.
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Drawings from the Society’s archives and publications – The Santa Fe