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Application filed by Siemens Schuckertwerke GmbhfiledCriticalSiemens Schuckertwerke Gmbh
Publication of CH53841ApublicationCriticalpatent/CH53841A/en
Device for the protection of objects located in the earth, such as pipelines, cables, etc., against earth currents with the help of an electrical protective circuit, especially in railway systems operated with direct current