For mine construction, an engine shaft1 is a mine shaft used for the purpose of pumping, irrespective of the prime mover.
References
References
- "The clue is in the name". groundsure.com. 27 October 2020. Retrieved 21 June 2025.
For mine construction, an engine shaft is a mine shaft used for the purpose of pumping, irrespective of the prime mover.
For mine construction, an engine shaft1 is a mine shaft used for the purpose of pumping, irrespective of the prime mover.