ductile iron casting with 100%pressure test, certified by ISO, TUV-PED, BV ... , Lose Wax Process(soluble glass): wax injection, wax welding, dipping, sand-coating, shell-making, dewaxing, cleaning, pouring, cutting.2, Materials: carbon ... line of machining equipment, including 4 CNC machining centers. pressure investment casting, ductile iron