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Application filed by Ф.Е. Костянко, нко Ф.Е. КостfiledCriticalФ.Е. Костянко
Priority to SU129092ApriorityCriticalpatent/SU34924A1/en
Application grantedgrantedCritical
Publication of SU34924A1publicationCriticalpatent/SU34924A1/en