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Publication date
Application filed by И.В. Дормидонтов, А.А. МихайловfiledCriticalИ.В. Дормидонтов
Priority to SU120296ApriorityCriticalpatent/SU40502A1/ru
Application grantedgrantedCritical
Publication of SU40502A1publicationCriticalpatent/SU40502A1/ru