But on account of folding operation, too thick paper can not be used, as that will make the cover of the packing box look quite thin.
但因为考虑到折叠，不能用太厚的纸，而使包装盒的盖子显得有点薄弱。
The FOPT algorithm includes three parts: casual order preservation, Folding Operation Transformation scheme (FOPT) and garbage collection.
FOPT算法包含三个部分，因果关系维护、操作变换和垃圾操作回收。
After adopting the structure, the scooter has the advantages of simple and reasonable structure, convenient folding operation, safe and stable use, low noise, long service life and the like.
采用本结构后，具有结构简单合理、折叠操作方便、使用安全可靠、噪声小、寿命长等优点。
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