Ngwa dịgasị iche iche: ichikota, polishing, igbutu, nchara na-ewepu ngwaahịa metal;Ngwa eze (prosthetics) egweri, polishing, wdg;Ọ na-eche ihu n'elu ọgwụgwọ ngwa ekwentị mkpanaaka, ngwa kọmputa, akụkụ akpaaka, akụkụ izugbe na ụlọ ọrụ eze.