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Application filed by Харьковский инженерно-строительный институтfiledCriticalХарьковский инженерно-строительный институт
Priority to SU772461911ApriorityCriticalpatent/SU634190A1/ru
Application grantedgrantedCritical
Publication of SU634190A1publicationCriticalpatent/SU634190A1/ru