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Application filed by Bohuslav Bartak, Miroslav Loucka, Jaroslav KrajcafiledCriticalBohuslav Bartak
Priority to CS888943ApriorityCriticalpatent/CS269639B1/en
Publication of CS894388A1publicationCriticalpatent/CS894388A1/en
Publication of CS269639B1publicationCriticalpatent/CS269639B1/en