Pullman standard's ps-2cd 4427 covered hopper Hopper car covered dizzy pullman wonderings wanderings Patent us5259322
Diagram of covered hopper car by the Gouvernement du Canada
Patent us4362111
Diagram of covered hopper car by the gouvernement du canada
Hopper retainer designbuildop hansmannsCoal hopper details – pt 2 – notes on designing, building, and Patents hopper car claims covered drawing11in 17in 42cm 28cm nwhs hopper.
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Hopper car diagram
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