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Application filed by А. Ш. Вассерман и А. П. СередаfiledCriticalА. Ш. Вассерман и А. П. Середа
Priority to SU782622175ApriorityCriticalpatent/SU688591A1/en
Application grantedgrantedCritical
Publication of SU688591A1publicationCriticalpatent/SU688591A1/en