1,gold recovery rate is 97% 2,gain four ... machine (roughing device), jig (cleaning equipment),it is used for the completion of ore washing, chose, crushing, screening, ... belt, chute, motor, reducer, it is used for the abandoned gravel and tailings(Weifang Lingwei Machinery Co ... drive, electrical control and lighting components, It is used for driving and controlling the mining, mineral selecting, water ...