Ngwakọta ọkpọkọ gụnyere ọkpọkọ mkpofu, flues, ventilashion ducts, ọkpọkọ ntụ oyi, mmiri na-ebufe mmiri na ọkpọkọ mmiri, ọkpọkọ gas, ọkpọkọ eriri, ogwe ebufe ngwongwo, wdg, ma bụrụ akụkụ nke ụlọ ahụ. ọkpọkọ mkpofu ahịhịa kwụ ọtọ maka ibuga ihe mkpofu ụlọ n'ọtụtụ ụlọ na nnukwu ụlọ b...
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