Fieldbook for railroad engineers. Containing formulæ laying out curves, determining frog angles, levelling, calculating earthwork, etc. Etc., ... tangents. By John B. Henck
Product specifications
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Fieldbook for railroad engineers. Containing formulæ laying out curves, determining frog angles, levelling, calculating earthwork, etc. Etc., ... tangents. By John B. Henck
| EAN |
|
|---|