1 the screw and cylinder are nitrogenation treated and precise processed. So it is hard, wearable and anti-cauterization. 2 the whole set adopts perch brake driving. So the rewinding is very smooth. 3 the electric part adopts brake driving. So it can help to save power 30%. 4 the noise is low, no dust, environmental and power saving. Installing dimensions:23000¡á1300¡á1500 mm Weight:3000kg.