Ngwaahịa e ji a gburugburu na adiana, a isi nke osisi nha nha kechie, na interface nke mgbanaka mgbe ịgbado ọkụ ọgwụgwọ, ọzọ siri ike na a pụrụ ịdabere na, osisi nha nha kechie na mkpọpu osisi ọzọ adaba, ngwa ngwa na mfe na-arụ ọrụ.Na plastic casing na-agbasawanye mma.Mgbe elu àgwà galvanized ọgwụgwọ, na-eji ire ụtọ elu, na-egbuke egbuke, nchara eguzogide, corrosion eguzogide karịsịa.Nkwakọ ngwaahịa bụ obere igbe akwụkwọ agba aja aja + igbe osisi.