锥形排气系统显示，在低频率大大减少失真，降低空气噪音比普通圆形通风口。
The conical vent system shows significantly less distortion and lower air noise at low frequencies than common circular vent openings.
超高性能优质电机、空气动力学原理、绝佳风口输出效率，风力噪音完美比。
Good motor with high performance, aerodynamics principle, excellent outputting efficiency, perfect on dealing with wind power noise.
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