1, simple structure, reliable and noiseless;

2, the use of cone piston, good sealing performance, filling liquid is accurate, fluid and easy;

3, cerebrospinal fluid are made of stainless steel and facilitates loading and unloading, which can carry out aseptic filling;

4, cylinder, push rod, a piston made of stainless steel, corrosion-resistant, resistant to wear and tear;

5, the speed is continuously adjustable, easy to operate.