Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
GPO installs automatic civil defense warning system
New electronic system provides Civil Defense warning signal for 6000 Government Printing Office employees; it consists of sirens powered by standard building electric service and electronically controlled by carrier current over existing program bell system.
GPO installs automatic civil defense warning system
New electronic system provides Civil Defense warning signal for 6000 Government Printing Office employees; it consists of sirens powered by standard building electric service and electronically controlled by carrier current over existing program bell system.
GPO installs automatic civil defense warning system
Elec Construction Maintenance
Willingmyre, D.W. (Autor:in)
1957
4 pages
Aufsatz (Zeitschrift)
Englisch
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