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METALLURGICAL INDUSTRIES: A. Ferrous : (1) Iron and steel (metal). (2) Ferro- alloys. (3) Iron and steel castings and forgings. (4) Iron and steel structurals. (5) Iron and steel pipes. (6) Special steels. (7) Other products of iron and steel. B. Non-ferrous : [(1) Precious metals, including gold and silver, and their alloys. (1A) Other non-ferrous metals and their alloys.] (2) Semi-manufactures and manufactures.