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Priority to FI894705ApriorityCriticalpatent/FI85836C/fi
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Publication of FI894705ApublicationCriticalpatent/FI894705A/fi
Publication of FI85836BpublicationCriticalpatent/FI85836B/fi
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Publication of FI85836CpublicationCriticalpatent/FI85836C/fi