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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
C21D3/00—Diffusion processes for extraction of non-metals; Furnaces therefor
C21D3/02—Extraction of non-metals
C21D3/04—Decarburising
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FR459853D1913-03-061913-03-06Perfectionnements dans les procédés chimiques spécialement applicables au traitement des métaux
ExpiredFR459853A
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