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1. Chemistry  (72)
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3. Metallurgy Of Iron  (59)
4. Treatment In Molten State Of Ferrous Alloys  (53)
5. Processing Of Pig-Iron, E.G. Refining, Manufacture Ofwrought-Iron Or Steel  (53)
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15. General Measures For Producing And Maintaining Effectivefunctioning Of Machines Or Installations  (28)
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