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Application filed by Karel Ing Vach, Milan Ing ZnamenacekfiledCriticalKarel Ing Vach
Priority to CS88616ApriorityCriticalpatent/CS265149B1/en
Publication of CS61688A1publicationCriticalpatent/CS61688A1/en
Publication of CS265149B1publicationCriticalpatent/CS265149B1/en