... ).1. Mining system: It is made up of the dredging bucket, chain, underwater big arm, upper and lower quadrangled wheel, ... up of cylinder rolling screen, gold selecting combinational chute and bucket, gold washing machine (roughing device), jig (cleaning equipment),it is ... is made up of the big arm lifting winch, bow rope winch, raised anchor winch, sliding winch, etc., it is used for operating of ...