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Application filed by Inst Gornogo Dela Sibirskogo O, Proizv Ob StroimashfiledCriticalInst Gornogo Dela Sibirskogo O
Priority to IT48018/82ApriorityCriticalpatent/IT1148521B/en
Publication of IT8248018A0publicationCriticalpatent/IT8248018A0/en
Application grantedgrantedCritical
Publication of IT1148521BpublicationCriticalpatent/IT1148521B/en