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Application filed by Ленинградский институт точной механики, оптикиfiledCriticalЛенинградский институт точной механики
Priority to SU1743417ApriorityCriticalpatent/SU436315A2/en
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Publication of SU436315A1publicationCriticalpatent/SU436315A1/en
Publication of SU436315A2publicationCriticalpatent/SU436315A2/en