Fences are widely used in our production and life, including garden fences, highway fences, municipal fences and so on. In many cities, private villas and courtyard fences are popular, mostly wooden plates. It is composed of fence board, transverse belt board and fence column. The general height is between 0.5 ~ 2m. Different shapes, generally for decoration and simple protection, are very popular in Europe and America.
Fences are made of iron bars, wood bars, barbed wire, etc. they are similar to fences and stronger. The role of barbed wire fence in war is to block the road. Put a circle of barbed wire in front of the position and add machine gun rapid fire guns behind it. If the enemy wants to attack, he can only pass through the barbed wire, either cut off the barbed wire or drill from below. No matter which method will explode in the fire and cause huge casualties. Moreover, from the role of blocking the road, barbed wire is much easier to use than mines, High cost performance. During the Russo Japanese War, half of the soldiers of the third Japanese Army Corps died on the barbed wire.