... welcome Ningbo COSZO is specialized in producing kinds of investment casting spare parts, such as architecture goods, machinemetal ... steel, ductile iron, etc. investment casting part: 1)aluminium Casting Product 2)Various CNC machining 3)Reasonable ... AISI, BS, DIN, JIS, NF3.Process: investment casting, die casting, gravity casting, sand casting4.Machining: turning , milling, drilling, grinding, ...