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