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When we use a paper towel roll, when sometimes need to roll out of the middle of the paper to use, many people will encounter difficult to come out of the situation. This is because the area of contact with the tissue paper roll is relatively large, the friction coefficient increases the inconvenience caused by us. Thus, with the spiral structure, the paper roll is installed after cutting the spiral structure, it is easy to solve this problem. Reduce friction, more easily taken out from the paper roll!
Guangdong university of petrochemical technology