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A large number of people fall into the sewer and get injury incautiously because of the lost of the manhole cover annually in China. This manhole cover is painted with the coating at the edge that can absorb the light in the daytime and glow at night to ensure the pedestrian can notice the damaged manhole cover and reduce the accidents.
Nanchang University
Nanchang, China
Zhu Yingzhe,
Nanchang University