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C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
C21C1/00—Refining of pig-iron; Cast iron
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FR631077D1926-03-181927-03-17Procédé de fabrication d'un fer ou d'un acier de qualité supérieure, d'une teneur en carbone voulue quelconque
ExpiredFR631077A
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Procédé pour le traitement métallurgique de grains colithiques extraits des minettes, ainsi que d'autres minerais pulvérulents, ou minerais impalpables à forte teneur en fer