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Application filed by В.А. Кошарный, А.Г. СеливерстоваfiledCriticalВ.А. Кошарный
Priority to SU147148ApriorityCriticalpatent/SU39717A1/en
Application grantedgrantedCritical
Publication of SU39717A1publicationCriticalpatent/SU39717A1/en