... systems(Weifang Lingwei MachineryCo.,Ltd).1. Mining system: It is made up of the dredging bucket, chain, underwater big ... Lingwei Machinery Co.,Ltd2. Mine selecting equipment: It is made up of cylinder rolling screen, gold selectingcombinational chute and ... Weifang Lingwei Machinery Co.,Ltd)..Electronic Control System: It is made up of Electrical control system, generator control,electric drive, ...