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Application filed by Frantisek Ing Markalous, Pavel Letko, Josef DittrichfiledCriticalFrantisek Ing Markalous
Priority to CS837535ApriorityCriticalpatent/CS240768B1/en
Publication of CS753583A1publicationCriticalpatent/CS753583A1/en
Publication of CS240768B1publicationCriticalpatent/CS240768B1/en