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Application filed by Milan Ing Kratochvil, Frantisek Voracek, Zdenek DrastichfiledCriticalMilan Ing Kratochvil
Priority to CS867868ApriorityCriticalpatent/CS260238B1/en
Publication of CS786886A1publicationCriticalpatent/CS786886A1/en
Publication of CS260238B1publicationCriticalpatent/CS260238B1/en