When the vertical partition of puzzle pieces is more than 2, the puzzle pieces will be added to the drawer.
当纵向分割块数大于2时，图块将会放入抽屉中。
The vertical partition board is reserved, which ensures that the advantage of the regenerating mode on back flow can be still exerted.
保留了竖向隔板，使回程式再生方式的优点仍可得以发挥。
The vertical partition board is reserved, which ensures that the advantage of the regenerating mode on back flow can be still exerted.
保留了竖向隔板，使回程式再生方式的优点仍可得以发挥。
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