... system High Precision CNC Machined FlangeMaterial ST-52, investment casting, spare parts/OEM, used on the train system, export to ... What's in our production:Valves, Construction Spare Parts, Auto parts, Railways Parts, Injection Machines Spare Parts,Toolings, Fixtures, Molds and various metal ... Aluminum Alloy, and Zinc Alloy etc.3.Grey Iron, Ductile Iron, Cast Iron etc Precision Casting Machining Parts