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C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
C21D9/46—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for sheet metals
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FR418452D1909-07-191910-07-19Fours combinés horizontaux pour le chauffage des plaques d'acier ou de fer, des fers cornières, etc.
ExpiredFR418452A
(fr)
Four à induction pour la préparation de l'acier, avec gouttières de chauffage horizontales et dispositifs pour empecher le laitier de pénétrer dans les gouttières de chauffage