1. Ọdịgidere: Ọla kọpa ọkpọkọ nwere ike chemical Njirimara.Ọ na-ejikọta oyi, nkwụsị ọkụ, nrụgide nrụgide, nkwụsị nke corrosion na ọkụ ọkụ, a pụkwara iji ya mee ogologo oge na gburugburu dị iche iche.2. Nchekwa na ntụkwasị obi: Ọla kọpa na-ejikọta uru nke ọkpọkọ ígwè na ...
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