... 5Brand:Shantin,OEM Other name:water pump impeller parts,pump impeller,fan impeller Manufacturing process:investment casting,centrifugal casting etc Machining:turning,milling,grinding,machineryManufacturing ... , alloy steel etc.2.Manufacturing Processes: sand casting, investment casting, centrifugal casting etc.3.Technology: surface treatment, polishing, machining, plating, heat ...