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Application filed by Nikolaj A Alpatev, Vasilij A Khrupin, Grigorij A Grebennikov, Yurij Pribytkov, Aleksandr A RomanovfiledCriticalNikolaj A Alpatev
Priority to SU782593638ApriorityCriticalpatent/SU675297A1/en
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Publication of SU675297A1publicationCriticalpatent/SU675297A1/en