non-curling paper 不卷曲的纸张
So we can imagine picking up this piece of paper, and curling these two regions so that they're close to each other.
所以我们可以想象一下，捡起一张纸，卷起这两个区域以致它们靠得很近。
The impact experiment and theoretical analysis of axial splitting and curling of steel tubes is reported in this paper.
报导了钢管撕裂卷曲变形的冲击实验研究和理论分析。
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