Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Placer mining dredging still one of California's leading industries
Use of gold dredges in California; large gold production; development of design of dredge; power for dredging is usually electric, if available, and is delivered to dredge by submarine shore cable floated on barges; most dredges in California have a-c electric equipment, but in recent years several have been equipped with d-c units and variable speeds. (See also Western Machy and Steel World v 31 n 1 Jan 1940 p 14-6)
Placer mining dredging still one of California's leading industries
Use of gold dredges in California; large gold production; development of design of dredge; power for dredging is usually electric, if available, and is delivered to dredge by submarine shore cable floated on barges; most dredges in California have a-c electric equipment, but in recent years several have been equipped with d-c units and variable speeds. (See also Western Machy and Steel World v 31 n 1 Jan 1940 p 14-6)
Placer mining dredging still one of California's leading industries
Pac Mar Rev
Romanowitz, C.M. (Autor:in) / Sawin, H.A. (Autor:in)
1940
3 pages
Aufsatz (Zeitschrift)
Englisch
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Placer mining dredging still one of California's leading industries
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