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ELEKTROMETALL AB
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ELEKTROMETALL AB
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Procédé de fabrication du ferrotungstène au moyen du wolfram (minerai) pouvant utiliser les fours et les creusets employés pour la fusion de l'acier
Procédé pour la production de métaux et d'alliages par fusion de composés métallo-acides ou métalloÏdo-acides alcalino-terreux avec des sulfures métalliques et du charbon, dans le four électrique