Okpu igwe anaghị agba ncharanzube: isi ọrụ bụ ijikọ na ijikọ akụkụ, na gburugburu ebe obibi nchebe ngwá, ọgwụ ngwá ọrụ, nkwurịta okwu ngwá ọrụ, ike, electronic ngwaahịa, ngwá, nri ígwè, petrochemical ụlọ ọrụ, ụgbọ mmiri mgbakọ, mgbapụta valve pipeline, mgbidi ákwà mgbochi ụlọ, n'èzí Ọ. nwere ngwa n'oge, egwuregwu ụlọ ọrụ, n'èzí mma na ndị ọzọ ọrụ.