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Application filed by Институт Электросварки Им.Е.О. ПатонаfiledCriticalИнститут Электросварки Им.Е.О. Патона
Priority to SU1910600ApriorityCriticalpatent/SU491451A1/en
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Publication of SU491451A1publicationCriticalpatent/SU491451A1/en