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Ulvac Inc
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Ulvac Inc
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Application filed by Ulvac IncfiledCriticalUlvac Inc
Priority to JP1083976ApriorityCriticalpatent/JPS5294808A/en
Publication of JPS5294808ApublicationCriticalpatent/JPS5294808A/en
PURPOSE: Plasma arc is used in metal melting by vacuum induction furnace. Material bridge occuring at upper side of crucible is thus melted easily and removed, nonmetallic inclusion content in molten metal is also decreased.