Okwu Mmalite: Mgbe a bịara n'ihe gbasara ọkpọkọ, ikpo ọkụ, na usoro jụrụ oyi, ọkpọkọ ọla kọpa na-abụkarị nhọrọ a na-ewu ewu n'ihi oke ọkụ na ọkụ eletrik ha, nguzogide corrosion, ike, ductility, na ọtụtụ nguzogide okpomọkụ. N'ihe dị ka afọ 10,000, mmadụ anyị ...
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