... is made up of the dredging bucket, chain, underwater big arm, upper and lower quadrangled wheel, active power, main reducer, ... washing machine (roughing device), jig (cleaning equipment),it is used for the completion of ore washing, chose, crushing, screening, conveying, ... ship, changing ship, mooring ship and submarine sliding and lifting arm upgrade(Weifang Lingwei Machinery Co.,Ltd)..6. Gantry: it ...