... HYDRAULIC AND VALVE PARTSPrecision machining1.Material: Stainless steel,Website:http://www.everlastingdg.com, Carbon steel, Aluminum alloy, Copper alloy, etc. 2.Surface treatment: painting ... drawing or samples.OEM SUPPLY INDUSTRIAL EQUIPMENTPrecision machining1.Material: Stainless steel, Carbon steel, Aluminum alloy, Copper alloy, etc. 2.Surface treatment: painting, electroplating, oxygenation ...