... casting 3. Sand casting , lost foam casting Bracket ductile iron Valve seat, reduction gear box1. sample or drawing by customer2. ... Fiting & Finish7.CNC &MIC machining and EDM machining8. Tooling Measurement &check 9. Assembly10. Trial production 11. Correction 1. Material: ductile ... . Progress: Lost foam casting, and ressin sand casting . 3. Valve seat, reduction gear box ,bracke 4. All kinds of box ...