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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
C21D9/50—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for welded joints
Akaryakitlarin karbonunun tamaminin gaz haline getirilmesine mahsus usul,atmosferin kirlenmesine karsi muecadeleye mahsus yeni vasitalar,ve bunlarin tekabuel eden blueloer
Appareils à chauffer l'air pour hauts ou bas fourneaux, à garniture très active d'échange de chaleur et chambre de combustion blindée, étanche, à isolation autonome et indéformable