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Application filed by Э.А. Геренштейн, С.В. Ключарев, И.В. ТроицкийfiledCriticalЭ.А. Геренштейн
Priority to SU47126ApriorityCriticalpatent/SU64215A1/ru
Application grantedgrantedCritical
Publication of SU64215A1publicationCriticalpatent/SU64215A1/ru