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Application filed by Александр Петрович ЗемляковfiledCriticalАлександр Петрович Земляков
Priority to SU1361719ApriorityCriticalpatent/SU439909A2/ru
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Publication of SU439909A1publicationCriticalpatent/SU439909A1/ru
Publication of SU439909A2publicationCriticalpatent/SU439909A2/ru