... water pump impeller parts,pump impeller,impeller partsManufacturing process:investment casting,centrifugal casting etcMachining:turning,milling,grinding,machineryFinishing:blasting,polishing,electro-polishingAttention ... .Material: bronze, cast iron, stainless steel, carbon steel, alloy steel etc.2.Manufacturing Processes: sand casting, investment casting, centrifugal casting etc.3.Technology: surface ...