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Application filed by Perm Polt I, Perm Vnii Tsellyulozno BumazhnfiledCriticalPerm Polt I
Priority to SU833535515ApriorityCriticalpatent/SU1147799A1/en
Application grantedgrantedCritical
Publication of SU1147799A1publicationCriticalpatent/SU1147799A1/en