A na-ejikarị ọkpọkọ spral steel na injinia mmiri, ụlọ ọrụ petrochemical, ụlọ ọrụ kemịkalụ, ụlọ ọrụ ọkụ eletrik, ogbugba mmiri n'ubi, ihe owuwu obodo.Maka njem mmiri mmiri: mmiri na-enye mmiri na drainage.Maka njem ụgbọ ala: gas, uzuoku, mmanụ mmanụ mmanụ.Maka nhazi...
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