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1.Авторское свидетельство СССР 376822, кл. Н 01 Н 43/00, 1971.1. Authors certificate of the USSR 376822, cl. H 01 H 43/00, 1971.2.Авторское свидетельство СССР 390594, кл. Н 01 Н 43/00, 19712. Authors certificate of the USSR 390594, cl. H 01 H 43/00, 1971I(прототип).I (prototype).