The shelf slat has many small circle holes which are arranged at equidistance, these small circle hole can help us to arrange the shelf on the level surface for conveniently.

• 箱内搁板条上每隔一定数量的搁板扣孔有个小圆孔，方便将同一搁板的搁板扣对齐放置在同一水平面上。