A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Construction of new ventilating shaft by Carter Coal Co, 20 1/2 ft in diam and 756 ft deep.
Construction of new ventilating shaft by Carter Coal Co, 20 1/2 ft in diam and 756 ft deep.
Sinking coal-mine ventilating shaft
Compressed Air Mag
Powell, W.S. (author)
1937
4 pages
Article (Journal)
English
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