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Application filed by Petr Ing Malina, Ladislav MachekfiledCriticalPetr Ing Malina
Priority to CS836613ApriorityCriticalpatent/CS243967B1/en
Publication of CS661383A1publicationCriticalpatent/CS661383A1/en
Publication of CS243967B1publicationCriticalpatent/CS243967B1/en