Français : Croquis d'un four d'affinage de la fonte en acier naturel, selon la méthode wallonne. Ce foyer wallon a été utilisé en Suède à la fin du XIXème siècle.
English: Sketch of a finery hearth use to convert pig iron in charcoal-hearth iron, or wrought iron. This Wallon hearth was used in Sweden at the end of XIX century.
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