21. The production of ferrous metals accounts for 95 percent of world metal production. 22. Such percentages for more valuable non-ferrous metals may be significantly greater. 23. Both accounts are engaging in recent vandalism at Ferrous metal recycling. 24. Commercially, electrolytic cells are used in electrorefining and electrowinning of several non-ferrous metals . 25. NISCO involves the pressing and smelting of ferrous metals and sales of steel materials. 26. Magnets from electronics are shown used to gather the smallest of ferrous metal scraps. 27. Other parts of the ship were constructed from non-ferrous metals for a similar reason. 28. Hamanaka, who gave his occupation as unemployed, formerly headed Sumitomo's non-ferrous metals trading department. 29. Gainers included securities stocks and some steel and non-ferrous metals . 30. _MINING . Military units run nearly 150 major mines producing coal and ferrous metals .
