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Priority claimed from IT25392/73Aexternal-prioritypatent/IT989187B/it
Application filed by Tecneco SpafiledCriticalTecneco Spa
Publication of ATA78076ApublicationCriticalpatent/ATA78076A/de
Application grantedgrantedCritical
Publication of AT346780BpublicationCriticalpatent/AT346780B/de