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Priority to FI902758ApriorityCriticalpatent/FI85211C/fi
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Publication of FI902758ApublicationCriticalpatent/FI902758A/fi
Publication of FI85211BpublicationCriticalpatent/FI85211B/fi
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Publication of FI85211CpublicationCriticalpatent/FI85211C/fi