| The concrete pile is 2 meter high and barbed wires are strained like "Y" letter. It has usually 24 wires which have electricity. As you see in the right side of the photo above, wires are connected by cables with each other. When sombody touches two wires or cuts a wire trying to breake the border, the flow of electricity is changed and an alarm is given. The alarm is accepted in the command tower and they can know in which sector the alarm has been given. |