Mainly used for large queuing order control and directional flow passage must queue facilities and scientific layout planning. Is widely used in people's concentrated places. Such as banks, railway stations, hospitals, post offices, theatres, airports, airports, subways, shopping malls supermarket cashier cash trading venues to safeguard customer property and information security, exhibition center, hotel, club, clubs, commercial buildings as a mobile protective isolation system, maintain order, range partitioning, a guide route the best choice!