Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Roof bolting
Development in roof bolting during 1951 shows trend toward additional refinements in techniques and testing; installed at 508 coal mines and 52 non-coal mines in 20 states; review and study of progress.
Roof bolting
Development in roof bolting during 1951 shows trend toward additional refinements in techniques and testing; installed at 508 coal mines and 52 non-coal mines in 20 states; review and study of progress.
Roof bolting
Min Congress J
Broughton, H.J. (Autor:in) / Johnson, L.H. (Autor:in)
1952
4 pages
Aufsatz (Zeitschrift)
Englisch
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| Engineering Index Backfile | 1953
| Engineering Index Backfile | 1950
| Engineering Index Backfile | 1957
| Engineering Index Backfile | 1951
Roof-bolting Delaware aqueduct
| Engineering Index Backfile | 1953