... casting/investment casting 1.ISO 9001 2.Strict QC 3.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 ... Total Quality Management, ERP, Advantages: Casting no internal shrinkage, external shrinkage defects ...