Precision casting/investment casting carbon/alloy 1.ISO 9001 2.Strict QC 3.Standard:ASTM,AISI,BS,DIN,JIS,NF 4.OEM service Machining equipments: drilling machine,vertical drilling,numerical control lathe, facing machine,rectification arc welding machine,etcTest equipments: hardness testing device, ultrasonic fault detector, versatile magnetic particle flaw detector,high speed carbon-sulfur ...