Na-eji: Ngwaahịa kwesịrị ekwesị maka elemental analysis, nha na obere size ígwè hardening, annealing, tempering, okpomọkụ ọgwụgwọ na kpo oku na laabu, ulo oru na Ngwuputa ụlọ ọrụ, sayensị nnyocha nkeji, nwekwara ike-eji maka sintering nke metal, nkume, seramiiki, nyocha mgbasa...
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