File:Ballast-Unloader.jpg
Ballast-Unloader.jpg (421 × 550 pixels, file size: 36 KB, MIME type: image/jpeg)
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 18:07, 14 May 2011 | 421 × 550 (36 KB) | Doug Coldwell | {{Information |Description ={{en|1=Steam shovel ballast unloader}} |Source =http://www.google.com/patents?id=Dp9SAAAAEBAJ&printsec=abstract&zoom=4#v=onepage&q&f=false |Author =United States Patent Office |Date =1912 |Permissio |
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