 | This article relies largely or entirely on a single source .(June 2025) |
For mine construction, an engine shaft [1] is a mine shaft used for the purpose of pumping, irrespective of the prime mover.
| | This article relies largely or entirely on a single source .(June 2025) |
For mine construction, an engine shaft [1] is a mine shaft used for the purpose of pumping, irrespective of the prime mover.
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 | This article about mining is a stub. You can help Wikipedia by expanding it. |