1. antioxidant, environment-friendly electrostatic powder spray coating;
2. international famous brand seal ring;
3. top-level power unit;
4. four protecting sets: pipeline explosion-proof valve、automatic mechanical、hydraulic self lock、rocker arm self-help lock；
5. powerful structure design，safety factor is up to 1.6 times. Maximum lifting capacity is 1.2 times as rated lifting capacity.
6. Safety voltage control
7. Adjustable height and width