... gas meter housing, gear box housing, engine housing, kitchen utensils (pot, pan, spoon, etc.), motorbicycle parts, automobile parts, power tools, ... package, 7.delivery. Material could be aluminium, brass, copper, iron, steel, magnesium, zinc, etc. B. Or the process could ... this:1.material purchasing( billet aluminium 6061, 7075, 2024, iron tube, steel bar, brass block and magnesium block, ect.), ...