... grey iron,ductile iron by vacuum casting,sand casting,lost foam casting or CNC machining2)Weight:5-1000kgs3)Process:sand casting,Vacuum ... casting and lost foam castingour advantage:1) strong enginnering team make ... iron,ductile iron by vacuum casting,sand casting,lost foam casting or CNC machining 2)Weight:2-1000kgs3)Process:sand casting ...