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Today with advanced technology, digital electronic products find broad application, the traditional paper-based material is no longer the main media to disseminate informations.however, if we need to put on paper or mind or text into the computer player . We need to type a word for word by hand, which is inefficient .If we use the ring , just gently scan the paper with it, the text will be stored in the ring .And it can be transmits the copy to the computer by wire .
Beijing Technology and Business
University
Beijing, China
Beijing Technology and Business
University
Beijing, China
Qidong Yang
Beijing institute of technology
Beijing, China
Chengcheng Sun
Beijing Technology and Business
University
Beijing, China
Han Hao