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Priority to FI761788ApriorityCriticalpatent/FI55076C/fi
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Publication of FI55076BpublicationCriticalpatent/FI55076B/fi
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Foerfarande foer kontinuerlig eller okontinuerlig behandling av smaeltflytande slagg isynnerhet innehaollande tungmetalloxider foer utvinnande av i detsamma ingaoende delar av vaerdemetaller eller dessas foereningar