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Priority to FI971923ApriorityCriticalpatent/FI103494B/en
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Publication of FI971923ApublicationCriticalpatent/FI971923A/en
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Publication of FI103494B1publicationCriticalpatent/FI103494B1/en
Publication of FI103494BpublicationCriticalpatent/FI103494B/en