1.railway part/locumotive part 2. Made by Continuous Cast Iron Tube 3.High ... Cylinder sleeve, Gears, Bushing, Piston ring, Ring carrier, Retainer, Brake drum, Bridge plug etc) Advantages of continuous cast iron hollow ... 3) ---nodularity 90% plus, ball diameter 7~8,ball number 400~600/mm22.Grey Cast Iron Tube(ASTM A48 class ... stator, gear Mine mechinanismwear resist sleeve, engine cylinder locumotive part