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Priority claimed from DE19712116986external-prioritypatent/DE2116986A1/de
Application filed by Dyckerhoff Zementwerke AgfiledCriticalDyckerhoff Zementwerke Ag
Priority to DK495474ApriorityCriticalpatent/DK495474A/da
Publication of DK495474ApublicationCriticalpatent/DK495474A/da