Pipe inner-wall cleaner : 1)Grinding materials matched with the cleaner: Shot, ore sand 2)Abrasive grain mesh: 25 and 10 Pipe inner-wall cleanerFeatures: 1) Mainly used in the field of oil drill, plane, shipping, automobile,chemical industry and build engineering2) Better to be used to de-rust the rust on the inner-wall of pipesbetween diameter 80-300mm with cleaning grade to Sa 2.53) Grinding ...