The multi-tier rack is a middle attic built on the existing shelf or work site for increasing storage area.

阁楼式货架是在已有的货架或工作场地上建造一个中间阁楼以增加储存面积。

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The multi-tier rack is a middle attic built on the existing shelf or work site for increasing storage area.

阁楼式货架是在已有的货架或工作场地上建造一个中间阁楼以增加储存面积。

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