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Application filed by Alfred G Gelbrecht, Igor D Grigorov, Valerij V Grigorjev, Jevgenij F Kolesnikov, Anatolij P PovaljajevfiledCriticalAlfred G Gelbrecht
Priority to CS365683ApriorityCriticalpatent/CS247143B3/en
Publication of CS365683A1publicationCriticalpatent/CS365683A1/en
Publication of CS247143B3publicationCriticalpatent/CS247143B3/en