... .Standard:ASTM,AISI,BS,DIN,JIS,NF 4.OEM service Technology:precision casting/investment casting; investment casting; water glass; lost wax;Material:Carbon steel, alloy steel ... , direct-reading spectrometer, etc.Service: processing with supplied drawings; OEM; Management: Total Quality Management, ERP, Advantages: Casting no internal shrinkage, external shrinkage ...