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Application filed by Alexandrov S Dipl Ing Savov, Savov M Dipl Ing MincevfiledCriticalAlexandrov S Dipl Ing Savov
Priority to CS802804ApriorityCriticalpatent/CS236954B1/en
Publication of CS280480A1publicationCriticalpatent/CS280480A1/en
Publication of CS236954B1publicationCriticalpatent/CS236954B1/en