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Application filed by Ivanchenko Ivan Stepanovich, Shulgin Nikolaj Grigorevich, Mironov Anatolij SemenovichfiledCriticalIvanchenko Ivan Stepanovich
Priority to SU772493976ApriorityCriticalpatent/SU634785A1/en
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Publication of SU634785A1publicationCriticalpatent/SU634785A1/en