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Application filed by Pospisil Petr, Jaroslav Hradil, Karel LoefflerfiledCriticalPospisil Petr
Priority to CS847163ApriorityCriticalpatent/CS252179B1/en
Publication of CS716384A1publicationCriticalpatent/CS716384A1/en
Publication of CS252179B1publicationCriticalpatent/CS252179B1/en