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Application filed by Vlastimil Sedlacek, Jaroslav Ing Kropacek, Valter Kovar, Milan VanekfiledCriticalVlastimil Sedlacek
Priority to CS842872ApriorityCriticalpatent/CS239081B1/en
Publication of CS287284A1publicationCriticalpatent/CS287284A1/en
Publication of CS239081B1publicationCriticalpatent/CS239081B1/en