Ngwa:A na-eji YCW usoro mmiri na-enweghị mgbapụta na igwe mgbake dị elu na mgbake dị elu na mmepe nke ihe ndọta n'ime ihe mkpofu nke metallurgy, Ngwuputa, igwe anaghị agba nchara, ọla edo, ihe owuwu ụlọ, ike, coal na ụlọ ọrụ ndị ọzọ, yana ịsacha coal. osisi, ígwè ọrụ (steel slag), sintering osisi, wdg.