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Application filed by А.З. Суворова-ФеофилактоваfiledCriticalА.З. Суворова-Феофилактова
Priority to SU198620ApriorityCriticalpatent/SU50702A1/en
Application grantedgrantedCritical
Publication of SU50702A1publicationCriticalpatent/SU50702A1/en