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The consistency of braille allows the blinds to find the key of corresponding lock more convenient.
The door swith can be judged according to the pearl on the lock.
Guangdong Ocean University
zhanjiang, China
Jie Gao,
Guangdong Ocean University
Yiye Wang,
Guangdong Ocean University
Guanwen Wu,
Guangdong Ocean University
Zhiying Chen,
Guangdong Ocean University