A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Illustrated description of apparatus designed to permit shots to be fired from the surface at will in any part of the mine. (2500 w.) (No. 38003 C)
Illustrated description of apparatus designed to permit shots to be fired from the surface at will in any part of the mine. (2500 w.) (No. 38003 C)
Electric shot firing
Mines Min
Wittich, Lucina L. (author)
1912
Article (Journal)
English
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