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C21B13/00—Making spongy iron or liquid steel, by direct processes
C21B13/08—Making spongy iron or liquid steel, by direct processes in rotary furnaces
C21B13/085—Making spongy iron or liquid steel, by direct processes in rotary furnaces wherein iron or steel is obtained in a molten state
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FR501148A1918-09-031918-09-03Système de four rotatif pour la fabrication directe du fer ou de l'acier ou pour la fabrication de la fonte
ExpiredFR501148A
(fr)