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- Basic oxygen furnaces 1
- Blast furnaces 1
- Coke-ovens 1
- Industrial equipment 11
- Iron and steel workers 3
- Metals --Finishing 1
- Milling machinery 13
- Mills and mill-work 13
- Open-hearth furnaces 3
- Photography, Industrial 13
- Rolling (Metal-work) 3
- Steel --Cold working 1
- Steel --Heat treatment 6
- Steel --Metallurgy --Oxygen processes 1
- Steel industry and trade 13
- Steel ingots 1