"Small Cooling Fan" depending on the material and structure, in actual use, there are many different types of them exist. If you are free to mix work on our normal use, but has a very big impact. First of all, "Small Cooling Fan" of different materials in the drag coefficient above, also has a great difference. If the vehicle is in motion the process of the emergence of the heating system imbalance, as well as the potential difference between the potential of the situation, are likely to lead to "Small Cooling Fan" suffered electrochemical corrosion, and can not normally be used.