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Application filed by А. П. Гиндис, Д. Т. Костин , Т. Н. АндриевскаfiledCriticalА. П. Гиндис, Д. Т. Костин , Т. Н. Андриевска
Priority to SU1620551ApriorityCriticalpatent/SU427986A1/ru
Application grantedgrantedCritical
Publication of SU427986A1publicationCriticalpatent/SU427986A1/ru