... : carbon steel, alloy steel, cast iron, cast steel, pig iron, grey iron, ductile cast iron and so on2.material standard:GB,DIN,EN ... AISI,SAE,ASTM,UNS,ACI3. Technology: lost wax (water glass) Manufacture process:1) Lost Wax Process: Wax Patterns, Sand ... Shot Blasting, Reshaping, Machining2) Has established efficient quality system and obtained international approvals ISO9001, TUV-PED, BV3) Produced by ...