... ,JIS,NF 4.OEM service Technology:precision casting/investment casting; investment casting; water glass; lost wax;Material:Carbon steel ... machine,peening machine,drilling machine,3D paralleling vibrating casting machine,arc welding machine, wax injection machine, ... OEM; Management: Total Quality Management, ERP, Advantages: Casting no internal shrinkage, external shrinkage defects; rich experience in ...