... pump impeller parts,pump impeller,impeller partsManufacturing process:investment casting,centrifugal casting etcMachining:turning,milling,grinding,machineryFinishing:blasting,polishing,electro-polishingAttention: ... steel, carbon steel, alloy steel etc.2.Manufacturing Processes: sand casting, investment casting, centrifugal casting etc.3.Technology: surface treatment, polishing, machining, plating, ...