... Mining system: It is made up of the dredging bucket, chain, underwater big arm, upper and lower quadrangled wheel, active power ... washing machine (roughing device), jig (cleaning equipment),it is used for the completion of ore washing, chose, crushing, screening, conveying, ... is made up of the tape conveyor belt, chute, motor, reducer, it is used for the abandoned gravel and tailings(Weifang Lingwei ...