"Mini Air Cooling Fan" to make use of the mid-range or low gear. use of lubricants as a lubricant and DRA use over time, due to the seals, the oil will gradually be volatile, and the dust will enter the bearings, causing the fan speed slows down, the noise increases and other issues. many on this basis, manufacturers have done a lot to improve in order to achieve better results. Usually the first to open files fast, cool, slow down multi-file, you can reduce the fan consumption "Mini Air Cooling Fan" in the use of the best placed next to doors, windows, easy air circulation, improve the cooling effect, reducing power consumption. Holding in normal operation. Note "Mini Air Cooling Fan" routine maintenance. maintained its good performance, avoid fan deformation, vibration occurs, which to some extent, in favor of energy saving. oil bearing sleeve using the sliding friction bearings.