Cooling Fan Manufacturer air-cooled radiator

Analysis of air-cooled heat sink technologies "Cooling Fan Manufacturer" fan shape articles is now using a flat bottom surface of a square column, leaving the four corners of the mounting holes required for installation, the DC motor through the bracket on the frame, the rotor blades are connected together by a bearing mounted on the motor body. Some "atypical" of "CoCooling Fan Manufacturer" with a more specific shape and design, but the overall structure and this is not much difference. So, we should measure a "Cooling Fan Manufacturer" what aspects of the quality of the data passed? Measure the quality of a fan, the two most important aspects of performance and life, followed by more and more attention is the work of noise; in addition, related to the ability of normal use, you must also pay attention to the specifications of the fan and power.