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The ball pen's cap sometimes is very tight and you should use a lot strength when you pull it out.The new design makes the cap like a clip and makes it very convinient when you pull it out.
While you are reading, you may use the clip(cap) to stable the book page, which makes your reading convinient.
Usually ,the pen's using life ends when the oil runs out. You may keep the cap with the new design, this may prolong the pen's using life, making it recyclable.
South China University of Technolog