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Application filed by И.И. Грядасов, дасов И.И. ГрfiledCriticalИ.И. Грядасов
Priority to SU128433ApriorityCriticalpatent/SU36235A1/en
Application grantedgrantedCritical
Publication of SU36235A1publicationCriticalpatent/SU36235A1/en