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Priority to FI896207ApriorityCriticalpatent/FI89346C/en
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Publication of FI896207ApublicationCriticalpatent/FI896207A/en
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Publication of FI89346BpublicationCriticalpatent/FI89346B/en
Publication of FI89346CpublicationCriticalpatent/FI89346C/en