... cnc steel turned parts 1.casting parts material: cast iron,steel,stainless steel,brass,copper,aluminum,zinc etc2.Casting parts process: sand casting,investment casting ... sodium silicate sand etc3mahinelathe, CNC, drilling machine, milling machine, boring machine, planting machine, machining center4processsand casting, investment casting, lost wax casting, die casting, forging, stamping, machining ...