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Application filed by А. А. Кринский, Б. Люшин , В. К. ЧепульfiledCriticalА. А. Кринский, Б. Люшин , В. К. Чепуль
Priority to SU1178720ApriorityCriticalpatent/SU250614A1/ru
Application grantedgrantedCritical
Publication of SU250614A1publicationCriticalpatent/SU250614A1/ru