... .,Ltd).1. Mining system: It is made up of the dredging bucket, chain, underwater big arm, upper and lower quadrangled wheel ... washing machine (roughing device), jig (cleaning equipment),it is used for the completion of ore washing, chose, crushing, screening, conveying, roughing ... panning ship, in order to make the gold panning ship float smoothly and operate in the water(Weifang Lingwei Machinery Co ...