in the bearings of the fan can cause poor rotation or noise. It can be solved by adding lubricating oil, but be careful not to use too much lubricating oil, so as not to affect the normal operation of the fan.

in the bearings of the fan can cause poor rotation or noise. It can be solved by adding lubricating oil, but be careful not to use too much lubricating oil, so as not to affect the normal operation of the fan.

in the bearings of the fan can cause poor rotation or noise. It can be solved by adding lubricating oil, but be careful not to use too much lubricating oil, so as not to affect the normal operation of the fan.

in the bearings of the fan can cause poor rotation or noise. It can be solved by adding lubricating oil, but be careful not to use too much lubricating oil, so as not to affect the normal operation of the fan.

in the bearings of the fan can cause poor rotation or noise. It can be solved by adding lubricating oil, but be careful not to use too much lubricating oil, so as not to affect the normal operation of the fan.