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In life some raw food and dried fruit, we need to put in the crisper…Food is not fresh on sight by normal person… the condition is very difficult for the blind… They can't directly perceive whether fresh food or not…Mark Crisper are designed for the blind…Put the food into the container…Aim the crisper arrows lid on behalf of the date of Braille…So the next time out crisper blind people will know the date of the last deposit…
Zhejiang University of Technology
Zhejiang Sci-Tech University