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Application filed by Miroslav Ing Vajtr, Krasa Jiri, Rudolf Ing JurasekfiledCriticalMiroslav Ing Vajtr
Priority to CS868160ApriorityCriticalpatent/CS258177B1/en
Publication of CS816086A1publicationCriticalpatent/CS816086A1/en
Publication of CS258177B1publicationCriticalpatent/CS258177B1/en