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Aerial tramways in the metal-mining industry.
Aerial tramways in the metal-mining industry :construction and operating costs
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Published Year
1930-1939 (1)
1940-1949 (1)
Subject
Aerial tramways (2) *
Mining machinery (2)
Conveying machiner (1)
Conveying machinery (1)
Author
Metzger, O. H. (2) *
