以及多个导流片，设置于该基座与该外框之间，其中该导流片具有一第一曲面和一第二曲面，以大幅降低扰流噪音并可提高风压。
Several flow guiders are fixed in between the frame base and the frame. The flow guiders have the first and the second curve surfaces to largely decrease noise and increase wind pressure.
以及多个导流片，设置于该基座与该外框之间，其中该导流片具有一第一曲面和一第二曲面，以大幅降低扰流噪音并可提高风压。
Several flow guiders are fixed in between the frame base and the frame. The flow guiders have the first and the second curve surfaces to largely decrease noise and increase wind pressure.
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