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Application filed by К.В. Васильев, Р.И. Скарятин, тин Р.И. СкарfiledCriticalК.В. Васильев
Priority to SU148738ApriorityCriticalpatent/SU45748A1/en
Application grantedgrantedCritical
Publication of SU45748A1publicationCriticalpatent/SU45748A1/en