Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Mile-long tunnel drains ojuela mine
Ojuela Drainage Tunnel near Mapimi in state of Durango, Mexico is 5200 ft. long, 9 by 8 ft. in cross-section; tunnel was driven through comparatively easy-drilling rock; work of drilling and of mucking.
Mile-long tunnel drains ojuela mine
Ojuela Drainage Tunnel near Mapimi in state of Durango, Mexico is 5200 ft. long, 9 by 8 ft. in cross-section; tunnel was driven through comparatively easy-drilling rock; work of drilling and of mucking.
Mile-long tunnel drains ojuela mine
Compressed Air Mag
Bruhn, F.E. (Autor:in) / Cleary, F.P. (Autor:in)
1928
2 pages
7 Figs.
Aufsatz (Zeitschrift)
Englisch
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