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Application filed by Gernot Sittnik, Peter HeinfiledCriticalGernot Sittnik
Priority to DD19994777ApriorityCriticalpatent/DD131909A1/de
Publication of DD131909A1publicationCriticalpatent/DD131909A1/de
DD19994777A1977-07-071977-07-07Schaltungsanordnung zur pruefung des isolationszustandes von streckenabschnitten elektrisch betriebener bahnen
DD131909A1
(de)