1.Aluminum shell cut section is flat, no trachoma, air hole, or flaws.

2.Oil cylinder internal use vertical honing machine honing. Oil cylinder sealing is good, which ensure two cylinder oil pressure stability.

3.Gear rack: Universal knee-type milling machine , adopt the whole knife one-time gear milling  to ensure teeth space.

4.Wheel gear: High frequency quenching-- coarse grinding --magnetic inspection -- accurate grinding.

5.High quality with competitive prices!