The column is the three columns of the car body, which are the front column, the middle column and the rear column in turn from front to back. For an automobile, the column not only plays a supporting role, but also plays the role of a door frame. In front of the column is a connecting column connecting the left and right front roof and the front cabin. The front pillar is between the engine compartment and the cockpit, above the left and right rearview mirrors, which will block part of the turning vision.

A column is a vertical or nearly vertical supporting structure in a window or cockpit area. Seen from the side, it is the front column, the middle column and the rear column in turn. For an automobile, the column not only plays a supporting role, but also plays the role of a door frame. In front of the column is a connecting column connecting the left and right front roof and the front cabin. The front column is between the engine compartment and the cockpit. Above the left and right rearview mirrors, part of the turning vision will be blocked. The center pillar not only supports the roof, but also supports the front and rear doors. Some additional parts should be installed on the center pillar. Therefore, most central columns have convex radius to ensure good force transmission performance. The difference between the rear pillar and the front pillar and the center pillar is that there are no problems such as line of sight blocking and getting on and off obstacles, so the structural size is large and the seal between the rear pillar and the car body is firm.