... ,NF 4.OEM service Technology:precision casting/investment casting; water glass; lost wax.Material:Carbon steel, alloy steel, stainless steelStandards:ASTM, AISI, BS, DIN, JIS ... 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.Casting ...