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Priority claimed from EP79300194Aexternal-prioritypatent/EP0003878B1/en
Application filed by Smidth & Co As F LfiledCriticalSmidth & Co As F L
Publication of IT7920443A0publicationCriticalpatent/IT7920443A0/it
Application grantedgrantedCritical
Publication of IT1202893BpublicationCriticalpatent/IT1202893B/it