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Application filed by Л.А. Дурденевский, С.И. КрыловfiledCriticalЛ.А. Дурденевский
Priority to SU86987ApriorityCriticalpatent/SU36537A1/ru
Application grantedgrantedCritical
Publication of SU36537A1publicationCriticalpatent/SU36537A1/ru