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As a rule, people always feel discommodity when they are using folders.
The reason is that papers often beside together.so "lean-to folder" makes some changes in transparent folder.The profile of the colorized clip become oblique, so that there is a slope on the profile of these papers. When we turn page, our fingers can only touch 1 paper, so that we can turn page by one hand easier.It is also more advantageous to the handicapped people.
Jiang Wu,Ningning Zhu,Qianmu Mao