... ,drilling,tapping,punching, CNC machining, Anodizing(natural color,silver,black,gold etc.), powder coating,brushing,burring ... powder coating, baking varnish,silkprint.) 7,Packing.Aluminium shell,Electric energy shell,Aluminum Electronic housing,Aluminum housing ... , Passivating, Electrophoretic coated and etc.4.Purpose: extruded aluminium lithium battery housing. We could manufacture according to ...