Oberhausen steelworks. Early 20th Century artwork of men at the steel forges in Oberhausen,Germany,using the Siemens-Martin process to make steel. This process involved using open-hearth furnaces. Most open-hearth furnaces were closed by the early 1990s and replaced by the basic oxygen furnace or electric arc furnace. Illustrated around 1930-40 | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / CCI Archives |
Bildgröße: | 3555 px × 2515 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |