前部面板提供了所述空气入口通道和所述空气出口通道中的一种通道，且所述前部面板具有与所述第一高度至少大体上相同的第二高度。

A front panel provides one of the air inlet and outlet passageways, and the front panel having a second height at least substantially the same as the first height.

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百叶窗提供了所述空气入口通道和所述空气出口通道中的另一种通道，且所述百叶窗具有与所述第一高度至少大体上相同的第三高度。

A louver provides the other of the air inlet and outlet passageways, and the louver has a third height at least substantially the same as the first height.

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通气管包括空气入口开口、出口开口以及与入口和出口开口成流体连接的导管。

The snorkel includes an air intake opening, an outlet opening, and a conduit fluidly connecting the intake and outlet openings.

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