The cooling fan has the characteristics of fast speed and large air volume, which can be applied to different industries. But how can we judge whether it is renovated when we buy it? Let's follow Xiao Bian to understand!
First of all, we can judge from the trademark. The original trademark printing is very exquisite and uniform. Moreover, the printed handwriting is clear and glossy, but the refurbished ones are informal, and the printing quality is poor. The color can be scraped off with a slight scratch,.
Then you can also judge from the fan leaf that the original surface has a graininess. If you touch it with your hand, it will have a rough feeling. If it is renovated, the surface of the fan leaf will have no graininess, and it will be more smooth. You can see the traces of friction.
It can also be seen from the installation hole that generally the refurbished ones are the ones used before, so there will be traces on the screws. If they are installed by themselves, they will leave traces on the holes of the screws, and will leave traces on the nuts around the holes.
