... valves, drains and pipe fittings production experience Process sand casting and resin sand castingService OEM serviceMaterialGG20/GG25/GGG50/GGG60 ... ' s drawings or samplesMachinery and EquipmentCNC machining, milling machine, drilling machine, boring machine, etc.CoatingBlank bitumen coated, Spray-painting, power coating ... we will return to you qualified products. Resin Sand Casting Grating for export