The exit sign was marked with an arrow.

出口处的记号用一箭头表示。

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Thus, at the opening of the emergency exit 11, the materials that may obstruct the emergency exit fall vertically in the direction of the arrow 12 to clear the emergency exit 11.

这样，在紧急出口11的开口处，可能阻塞紧急出口的物料沿着箭头12的方向竖直下落，以清理紧急出口11。

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