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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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FR670353D1929-02-271929-02-27Procédé d'amélioration des propriétés physico-chimiques de la fonte et des grosses et petites pièces de fonderie
ExpiredFR670353A
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