BRAKE DRUM FOUNDRY MATERIAL:CAST IRON, GREY IRON, DUCTILE IRON OEM MECHANICAL SERVICE,STRICT QC CASTING AND ... MACHINING WORKING cart iron,iron,ducilte ironbrake drum casting and machining ,OEM ... supply all the necessary assistant.Technology & EquipmentCasting: Sand Casting, Investment Casting, Die Casting, Forging, etc.Machining: Lathe, Boring, Vertical , ...