The fan is fixed to the top wall of the fixing frame.

该风扇固定在该固定架的顶壁上.

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A top wall is formed a depressed portion depressed toward inside the casing.

顶壁形成为具有向壳体内部凹陷的凹陷部分.

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The sheet discharge tray includes a tray member detachably disposed at the top wall.

片状物卸放盘包括可分离地布置在顶壁上的托盘构件.

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