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Application filed by Н.В. Куземкин, А.Н. ФомичевfiledCriticalН.В. Куземкин
Priority to SU37595ApriorityCriticalpatent/SU15836A1/en
Application grantedgrantedCritical
Publication of SU15836A1publicationCriticalpatent/SU15836A1/en