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Application filed by Siemens AgfiledCriticalSiemens Ag
Application grantedgrantedCritical
Publication of AT178933BpublicationCriticalpatent/AT178933B/en
AT178933D1952-06-101953-01-20
Switching arrangement with backup relay, toggle relay or the like, especially for the purposes of railway safety
AT178933B
(en)