Maintain The Balance of Your Knowledge
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奇趣发现---
This is a magic bookshelf that can help to balance your knowledge. Put on each end of the shelf different books, for example, books on economy on the left and cartons on the right.The end on which more books are assembling will be bending downward with the other one warping upward, reminding the owner to stop buying cartons. The two removable wooden frames, in which vases and picture frames are pl...
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2008