Automatic Barrier Gate System Used in parking lot Stable running with low noise ... to 6m, 1-6s 2.0mm Mild steel Automatic Barrier Gate SystemApplication:Parking lots, toll gates, goods yards, railway crossings, ... durable than compressed spring in heavy-duty site where barrier gate will open and close continously. AC motor can support ... Speed1s, 3s, 6s(s=Second, m=Meter) Automatic Barrier Gate System