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Application filed by Г. В. Складнее, Е. К. Несытов , К. С. ИгнатьевfiledCriticalГ. В. Складнее, Е. К. Несытов , К. С. Игнатьев
Priority to SU1772217ApriorityCriticalpatent/SU435386A1/ru
Application grantedgrantedCritical
Publication of SU435386A1publicationCriticalpatent/SU435386A1/ru