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Cardboard is used for packing material.
It is linked to the manufacture of paper since many years.
Add some points like:
1- History of cardboard
2- Uses of cardboard.
3- Benefits of cardboard.
4- How it emerge
5- How the style of cardboard are changing and how they are at present.
6- Comparison with other packing material
7- Conclusion.
2 5 2
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