It is important "24V DC Cooling Fan" wind of this air flow than the average fan is more stable. Wind from the beginning is the middle of the ring groove subtle wind "blowing out": blade less fan wore a huge ring that is not entirely a gimmick, but an important component of the center, "24V DC Cooling Fan" of , drove a 1 mm wide slit, and the wind, the very beginning from the base of the turbine fan drawing air base next to blow out here. Blade less fan, when the air flow from 1 mm wide slit blowing 55 miles an hour, "24V DC Cooling Fan" clip forward together with the surrounding air;