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The product can draw on horizontal line on white paper rapidly, which makes writing convenient.
Put the paper on board for drawing lines. There are raised horizontal lines on board. Rolling by roller, you can see raised horizontal line on paper.
Bejing Institute of Technology,Zhuhai
Zhuhai, China
Chaoran Yang,
Beijing Institute of Technology Zhuhai/China
Chaorbin Yang,
Guangdong university of Science &Technology Dongguan/China
Qing Han,
Beijing Institute of Technology Zhuhai/China
Yongpeng Xing,
Beijing Institute of Technology Zhuhai/China
