Allegheny Portage Railroad: Powered By Steam
Video produced for National Park Service, Allegheny Portage Railroad National Historic Site to explain how the stationary steam engines worked. This video is for demonstration purposes only. Copyright © 2016 by the National Park Service.
Видео Allegheny Portage Railroad: Powered By Steam канала Bill Doorley
Видео Allegheny Portage Railroad: Powered By Steam канала Bill Doorley
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