Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Wood pins have reduced roof support cost by $30,000 at 2500-ton Mary Gail No. 3 mine near Hyden, Leslie County, Ky; mining equipment regularly in use; details on wood pinning.
Wood pins have reduced roof support cost by $30,000 at 2500-ton Mary Gail No. 3 mine near Hyden, Leslie County, Ky; mining equipment regularly in use; details on wood pinning.
How wood pins serve Mary Gail
Coal Age
Edwards, J.H. (Autor:in)
Coal Age ; 59
1954
3 pages
Aufsatz (Zeitschrift)
Englisch
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