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Application filed by Е.А. Белицкий, Н.Г. РезницкийfiledCriticalЕ.А. Белицкий
Priority to SU74683ApriorityCriticalpatent/SU26203A1/en
Application grantedgrantedCritical
Publication of SU26203A1publicationCriticalpatent/SU26203A1/en