Leaves smoothness "Micro Cooling Fan": Non-design factors that affect the index, essentially depends on the producers of mold forming process and post-processing. In addition to the design curve is not flat blades will produce turbulence in the rotation, increasing friction, reduce fan efficiency, breakage "Micro Cooling Fan" performance, increased operating noise. Therefore, to deal with the blade surface smoothness strict control, if the purchased product handling is poor, can only be considered hand-grinding and other means to make up for the follow-up. Although the "Micro Cooling Fan" of the blade section curve more from the same base, various adjustments can be performed also are limited within a certain range, but still with a fan manufacturers made great improvements proposed design very unique.