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 (mm) 18700¡Á3500¡Á3700
