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Publication of SU374777A1publicationCriticalpatent/SU374777A1/en
Application filed by Н.И. УманfiledCriticalН.И. Уман
Priority to SU32729ApriorityCriticalpatent/SU11800A1/en
Application grantedgrantedCritical
Publication of SU11800A1publicationCriticalpatent/SU11800A1/en