... certificate:ISO9001:2008 Type: Sheet-metal Products OEM Subway Conveyer Dongguan Richhong metal Co. Ltd has long history in ... .Surface treatmentPolishing, zinc plating, nickel plating, chrome plating, powder coating, e-coating, dip coating, phosphate coating, anodize, PVC ... powder coating, dichromate plating, decrement plating, etc.Machinery and ...