Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Some studies on emergency mine communications
Determining practicable method of voice communication through soil and strata for use in mines and tunnels; conclusions indicate pattern for further detailed research into most promising aspects of investigation thus far, and data obtained are not represented as being complete; communication through earth at audio and at radio frequencies; investigations of other agencies.
Some studies on emergency mine communications
Determining practicable method of voice communication through soil and strata for use in mines and tunnels; conclusions indicate pattern for further detailed research into most promising aspects of investigation thus far, and data obtained are not represented as being complete; communication through earth at audio and at radio frequencies; investigations of other agencies.
Some studies on emergency mine communications
U S Bur Mines -- Report Investigations
Coggeshall, E.J. (Autor:in) / Felegy, E.W. (Autor:in) / Harrison, L.H. (Autor:in)
1948
44 pages
Supp Plates
Report
Englisch
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Applicability of radio to emergency mine communications
| Engineering Index Backfile | 1948
| British Library Online Contents | 1994
Communications for mine rescue
| Engineering Index Backfile | 1948
Communications for mine rescue
| Engineering Index Backfile | 1949