industry, metal, steel, cast steel works, Bessemer converter, wood engraving, "Buch der Erfindungen", published by Otto Spamer, Leipzig, 1872 Stock Photo - Alamy
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Iron and Steel | American Experience | Official Site | PBS
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industry, metal, Krupp in Essen, Germany, cast steel mill, decarburization of iron with Bessemer process, wood engraving, circa 1896 Stock Photo - Alamy
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Advertisement for Cast steel saws manufactured by Welch & Griffiths | Historic New England
Fonte d'acier dans les usines Krupp'). Illustration on history of... News Photo - Getty Images