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Priority to FI902204ApriorityCriticalpatent/FI85447C/fi
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Publication of FI902204ApublicationCriticalpatent/FI902204A/fi
Publication of FI85447BpublicationCriticalpatent/FI85447B/fi
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Publication of FI85447CpublicationCriticalpatent/FI85447C/fi