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Touch convenience sign / 1.07 Office

Touch convenience sign

A group of people who live in the darkness
Unseen
Only by touching
Touch convenience sign
Through different touch
There are differences and the role of classification
Provide convenience for their life

University

Beijing Technology and Business University

Beijing Technology and Business University
Beijing, China

Xinxin Cheng,
Beijing Technology and Business University

Yilin Liu,
Beijing Technology and Business University