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Application filed by Rostislav Ing Hanak, Josef Ing ZeitlerfiledCriticalRostislav Ing Hanak
Priority to CS843052ApriorityCriticalpatent/CS251264B1/en
Publication of CS305284A1publicationCriticalpatent/CS305284A1/en
Publication of CS251264B1publicationCriticalpatent/CS251264B1/en