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Application filed by Vladimir Ing Malina, Evzen Ing Sevcik, Pavel KlopecfiledCriticalVladimir Ing Malina
Priority to CS812120ApriorityCriticalpatent/CS239454B1/en
Publication of CS212081A1publicationCriticalpatent/CS212081A1/en
Publication of CS239454B1publicationCriticalpatent/CS239454B1/en