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Difficulties in connection with concreting shaft in Morning mine, owned by Federal Mining and Smelting Co., near Mullan, Idaho. Advantages of concrete shaft.
Difficulties in connection with concreting shaft in Morning mine, owned by Federal Mining and Smelting Co., near Mullan, Idaho. Advantages of concrete shaft.
Concreting the morning shaft
Eng. Min. Jl
Fred Johnson, J. (author)
1927
4 pages
3 Figs.
Article (Journal)
English
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