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In daily life, people use plastic paper files to keep their papers clean and tidy. But sometimes it is a little tricky to insert files into the clip. To clip papers quicker and easier, there’s a gap designed at the top of Smart Plastic File Clip.
Southwest Petroleum University
ChengDu, SiChuan, China
Minjie Lv,
Southwest Petroleum University
Xu Liu,
Southwest Petroleum University