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Priority to FI903657ApriorityCriticalpatent/FI84932C/fi
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Publication of FI84932BpublicationCriticalpatent/FI84932B/fi
Publication of FI903657ApublicationCriticalpatent/FI903657A/fi
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Publication of FI84932CpublicationCriticalpatent/FI84932C/fi