"220V Cooling Fan" Is there a center of gravity presence, is at work on the fan blades of the fan axis is not important, usually partial to one side or in a certain direction, most of these cases because of the use of a fan quality is not reliable, flawed, if not corrected a long process, it will have unusually large noise, and even lead to damage to the CPU. We can "220V Cooling Fan" removed, by finding the center of gravity method, to find the site of the sinking, and then use the wheel rubbing the area, several tests may also coincide with the center of gravity of the fan, so to install up, on case deviation does not appear. If you can maintain a good advertising vehicle "220V Cooling Fan", it can make advertising vehicles eliminating the consequences of component damage caused by overheating, but the vehicle also played a very good protection, the natural extension of the vehicle life also plays an important role.