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Filing date
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Application filed by З.Л. Степанян, н З.Л. Степан, В.П. Шахндзарян, н В.П. ШахндзарfiledCriticalЗ.Л. Степанян
Priority to SU197048ApriorityCriticalpatent/SU51959A1/ru
Application grantedgrantedCritical
Publication of SU51959A1publicationCriticalpatent/SU51959A1/ru