... 4.OEM service Technology:precision casting/investment casting; investment casting; water glass; lost wax; ... Auto parts, machinery parts, mine parts, construction and machinery parts, metallurgy tools, shipping parts, etc. Quality control system:ISO 9001:2008. inner control. 100% inspection for parts ... : Total Quality Management, ERP, Advantages: Casting no internal shrinkage, external shrinkage defects; ...