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Application filed by Vladimir Ing Oravec, Gejza GlibafiledCriticalVladimir Ing Oravec
Priority to CS869335ApriorityCriticalpatent/CS258688B1/en
Publication of CS933586A1publicationCriticalpatent/CS933586A1/en
Publication of CS258688B1publicationCriticalpatent/CS258688B1/en