... illegal intruders;3The function of anti-impulse: the expansion baffle (swing-arm) isself-locked before receiving the signal of opening the gate ... ;4Infrared and mechanical anti-nipping function: when the expansion baffle(swing-arm) is blocked with something in the course of turning back ... )10) Time of gate opening and closing: wing barrier :1s, swing gate barrier:2-3s speed gate for access control