... 1.Material:Iron,steel 2.Precess:Resin sand casting 3.Used:Construction,Oilfield,Electricity Pump Body,Pump ... supply pump impeller, propeller, pump parts, valves and so on! Sand casting have the clear advantage such as extreme versatility ... NF 3.Process: Sand casting (resin sand casting,green sand casting) 4.Machining: Turning, milling, drilling, grinding, threading, CNC machining, etc. 5.Finishing: ...