Original sentence: Abrasive flow machining (AFM) was developed by Extrude Hone Corporation in 1966, AFM is a very precise and economical method of smoothing and polishing internal surfaces and producing controlled radii.Metal polishing
Edited sentence: Abrasive flow machining (AFM) or extrusion honing was developed by Extrude Hone Corporation in 1966, AFM is a very precise and economical method of smoothing and polishing internal surfaces and producing controlled radii.Hydro-erosive grinding