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Application grantedgrantedCritical
Publication of SU7434A1publicationCriticalpatent/SU7434A1/en
Application filed by Г.С. ПетровfiledCriticalГ.С. Петров
Priority to SU3810ApriorityCriticalpatent/SU64926A1/en
Priority claimed from SU3810Aexternal-prioritypatent/SU64926A1/en
Publication of SU64926A1publicationCriticalpatent/SU64926A1/en