The frame has a column channel, of which one of the open ends is the air inlet and the other is the outlet.

扇框是为具有一柱状通道的框体，柱状通道二端于框体上各形成入风口及出风口。

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The frame has a column channel, of which one of the open ends is the air inlet and the other is the outlet.

扇框是为具有一柱状通道的框体，柱状通道二端于框体上各形成入风口及出风口。

youdao