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What are the problems that have been installed on the road covers? How to maintain?

 The following conditions materials to answer this question, put into the road covers at the factory, according to the length of time often have the following problems
1 lost, this is the most important problem encountered manhole cover, the solution is to try to use anti-theft covers, such as the market now more popular five manhole cover, three well covers are good.
Or strengthen patrols, increase the scope of human supervision to solve this problem
2 breakage. Breakage occurs, usually because the length of the manhole cover is long, and this problem does not usually occur in a short period of time. The solution is simple, so you can change it
3 position drop, that is commonly known as black eye. This situation is a long hole under the pressure down the road, generally need to adjust, reinstall or replace directly.

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