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Priority claimed from DE19843431291external-prioritypatent/DE3431291A1/de
Priority claimed from DE19853512967external-prioritypatent/DE3512967A1/de
Application filed by Hilti AgfiledCriticalHilti Ag
Priority claimed from EP85810371Aexternal-prioritypatent/EP0172788B1/de
Application grantedgrantedCritical
Publication of ATE34315T1publicationCriticalpatent/ATE34315T1/de