Details of door-shutting devices for municipal buses and cars which can be controlled either electrically, hydraulically, or pneumatically; pneumatic drive is especially desirable when vehicle is equipped with pneumatic brakes; new Knorr automatic door-closing devices with pneumatic control adopted by Berliner Verkehrs-Gesellschaft.
Door closed before starting
Tuer zu vor dem Abfahren
Automobile-Rundschau ; 31 , n 7
1929
3 pages
4 Figs.
Article (Journal)
German
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Before starting the metro Door-status-recognition App system
European Patent Office | 2016
|GWLB - Gottfried Wilhelm Leibniz Bibliothek | 2011
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