automatic road blocker 1.safe and durable 2.external infrared protection 3.It is very stable. 4.heavy duty ... time: < 3sec7) Capacity: <60MT Features:1) Mainly used to control vehicles at customs, military bases, important governmentdepartments, airports, jails, nuclear ... life, less and easy maintenance7) Can combine with other control equipment to realize auto control8) Manual operating mode is ...