... processes of water pump impeller1.IQC:check the DOB,the component should accord with "GB699-1999".The surface is without bubble,flaw ... -15s with each othre,the coating is without bubble or metal peel.)The feature of water pump impeller1. Workpiece surface smooth, the ... can be galvanized and so on. Applied Range of water pump impellerWidely used in Auto Industry,petrochemical industry,pharmacy,food wine ...