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Publication of SU3965A1publicationCriticalpatent/SU3965A1/en
Application filed by Г.А. Кирхгоф, О.И. КорзинаfiledCriticalГ.А. Кирхгоф
Priority to SU78238ApriorityCriticalpatent/SU28908A1/en
Application grantedgrantedCritical
Publication of SU28908A1publicationCriticalpatent/SU28908A1/en