... applications are found in the components for mobile telephone base stations and certain mobile telephone applications. The more important ... package, 7.delivery. Material could be aluminium, brass, copper, iron, steel, magnesium, zinc, etc. B. Or the process could ... 1.material purchasing( billet aluminium 6061, 7075, 2024, iron tube, steel bar, brass block and magnesium block, ect.), or the material ...