Through study of the testing technique for oil feed circuit and designing principle of data fusion, the realization of fault test and diagnosis for hydraulic system was illustrated.

Objective To design and develop a sort of heterogenous bone cervical vertebrae fusion cage, and test it by biomechanical experiments for the purpose of supplying biomechanics parameters for clinic.

Using biomechanical test, to examine its change at different fusion time which will offer basic information for its further development and clinical application.