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Priority to NL7305857ApriorityCriticalpatent/NL7305857A/xx
Priority to IT2177774Aprioritypatent/IT1009996B/it
Priority to DE19742419984prioritypatent/DE2419984C3/de
Priority to JP4749274Aprioritypatent/JPS5428781B2/ja
Priority to FR7414624Aprioritypatent/FR2226947B3/fr
Publication of NL7305857ApublicationCriticalpatent/NL7305857A/xx