A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Description of typical mine-telephone system and suggestions for making improved installations
Description of some existing communication systems underground; desirable and undesirable features in these systems; discussion of methods of installation whereby communication systems are less likely to be rendered inoperative following mine fires and explosions.
Description of typical mine-telephone system and suggestions for making improved installations
Description of some existing communication systems underground; desirable and undesirable features in these systems; discussion of methods of installation whereby communication systems are less likely to be rendered inoperative following mine fires and explosions.
Description of typical mine-telephone system and suggestions for making improved installations
U S Bur Mines -- Information Cir
Brown, C.L. (author)
1946
17 pages
Report
English
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