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Application filed by В.Я. СавченкоfiledCriticalВ.Я. Савченко
Priority to SU2097433/06ApriorityCriticalpatent/SU556639A1/en
Application grantedgrantedCritical
Publication of RU556639CpublicationCriticalpatent/RU556639C/en
Publication of SU556639A1publicationCriticalpatent/SU556639A1/en