Sign up for an Award
Participate with your entry in one of our professional or student awards.
Sign up for an awardLearn more:
Unsupported browser
You are using an outdated browser. Please upgrade your browser to improve your experience.
Due to a large amount of water during the rainy season, the manhole cover on the ground may be huge pressure washed away.While on the water surface for pedestrians
not see the potential danger,so each year due to straying
hole cover countless pedestrians injured.
The design of the hole cover structure transformation,
when the hole cover by the upward force becomes free to open and close, which does not make displacement in order to protection pedestrian safety.
Shanghai Normal University
SHANGHAI, China
Shanghai Normal University
SHANGHAI, China
Lu XuDong