Ezigbo ndị na-agụ akwụkwọ, ọkpọkọ square galvanized na-ekpo ọkụ na-ekpo ọkụ, dị ka ihe eji ewu ụlọ, nwere njirimara nke mgbochi corrosion na nguzogide ihu igwe siri ike, a na-ejikwa ya n'ọhịa dị ka ihe owuwu na njem. Yabụ, ka esi eme mmezi na nlekọta mgbe…
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