A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
The negaunee district underground properties
Three mines in this district are connected underground for ventilation and safety, but have separate shafts and surface equipment; all equipment is standardized and interchangeable as far as possible; full description of method of mining and equipment.
The negaunee district underground properties
Three mines in this district are connected underground for ventilation and safety, but have separate shafts and surface equipment; all equipment is standardized and interchangeable as far as possible; full description of method of mining and equipment.
The negaunee district underground properties
Min. Congress Jl
Graff, W.W. (author) / Brewer, C. (author)
1929
7 pages
14 Figs.
Article (Journal)
English
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