... off the Hg, plumbum, zinc, iron, etc. metal.Water treatment machineSS304,380V50HZ Conductivity<10us,Desalt>98% Auto PLC control,low ... /H 2 stage waste water treatment machineReverse osmosis system/water system/water equipment/water device/water machine/pure water/waste ... 3>Main equipment included that pre-treatment ,RO system,Washing system etc.(A).Pre-treatment is included sand filter ,carbon filter ...