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Shaft sinking by simultaneous excavating and walling
Describes method used at Lievin mines for sinking two shafts, 600 m., rapidly and securely.
Shaft sinking by simultaneous excavating and walling
Describes method used at Lievin mines for sinking two shafts, 600 m., rapidly and securely.
Shaft sinking by simultaneous excavating and walling
Foncage de puits par creusement et muraillement simultanes
Drouet, E. (author)
Technique Moderne ; 15
1923
3 pages
5 Figs.
Article (Journal)
French
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