Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Mine at Houghton, Mich, first opened in 1855; native copper in amygdaloid formation of Keweenawan age; early developments; resumption in 1937, after 5 yr shutdown; details of conditions and rehabilitation work on mine and mill; dewatering; retimbering; reconditioning incline shafts.
Mine at Houghton, Mich, first opened in 1855; native copper in amygdaloid formation of Keweenawan age; early developments; resumption in 1937, after 5 yr shutdown; details of conditions and rehabilitation work on mine and mill; dewatering; retimbering; reconditioning incline shafts.
Reopening and rehabilitating Isle Royale copper mine
Min Congress J
Eaton, L. (Autor:in)
1938
5 pages
Aufsatz (Zeitschrift)
Englisch
© Metadata Copyright Elsevier B. V. All rights reserved.
Rehabilitating lower levels, beattie mine
| Engineering Index Backfile | 1951
Online Contents | 2012
REHABILITATING SHEET ASSEMBLY AND PIPE REHABILITATING METHOD
| Europäisches Patentamt | 2022
REHABILITATING SHEET ASSEMBLY AND PIPE REHABILITATING METHOD
Europäisches Patentamt | 2023