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Application filed by Ю.К. МашковfiledCriticalЮ.К. Машков
Priority to SU1999219/06ApriorityCriticalpatent/SU478530A1/en
Application grantedgrantedCritical
Publication of RU478530CpublicationCriticalpatent/RU478530C/en
Publication of SU478530A1publicationCriticalpatent/SU478530A1/en