Discusses the CCTV, the MW radio rebroadcasting and the public address systems in Mt. Ena and Amikake tunnels, 8.5 and 2 km long, respectively.
A surveillance system for long tunnels (road tunnels)
Ein Rundsicht-Fernsehsystem fuer lange Strassentunnel
Toshiba Review, International Edition ; 103 ; 16-20
1976
5 Seiten
Article (Journal)
English
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