... cast steel, pig iron, grey iron, ductile cast iron and so on2.material standard:GB,DIN,EN,NF,ISO,JIS ... glass)Manufacture process:1) Lost Wax Process: Wax Patterns, Sand Shell Making, Dewaxing, Pouring, Sand Cleaning, Gas Cutting, Grinding, Heat ... Shot Blasting, Reshaping, Machining2) Has established efficient quality system and obtained international approvals ISO9001, TUV-PED, BV3) Produced by ...