1. Fully automatic, microcomputer-controller,freely programmable,30 possible programs , operator could set flexible. 2. Full suspension shock structure,low shake, low noise,combination of shock absorbance and springs for maximum absorption, need no excessive foundations. 3. Imported bearing, precise and durable. 4. High quality inverted system, easily realize washing and extracting frequency step less adjusting. 5, Built-out bearing lubrication, simple operation, convenient maintenance. 6, Safety door interlock system, reduce fatigue, misuse and the risk.