 nke anọ ọkachamara si duralumin alloy technology keynote okwu, ndị a ọdịnaya ga-akwalite a òkè dị mma nime edu ma na-akwalite anyị duralumin alloy mmepụta usoro mma na ọhụrụ na ngwaahịa, nkà na ụzụ ọhụrụ nnyocha na mmepe direction. 