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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
C21D11/00—Process control or regulation for heat treatments
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FR1027806D1950-11-171950-11-17Procédé pour la fermeture automatique des registres de fours et fours mettant en oeuvre ce procédé
ExpiredFR1027806A
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