Covers all belong to the scope of the public, because everyone must and covers direct relationship, for example, walk in the neighborhood, there are district manhole covers, walk on the road, the road manhole covers, walking in the villa villa covers, etc.

It is usually outside to pay special attention to rainwater well cover, sewage well cover, thermal manhole cover, or electric manhole cover, which can cause more damage to the human body. Especially under well through the city's drainage system, the hole was very deep, dropped a little chance of survival, especially under the heavy rain, water drainage system of large, fast velocity, once fell down, then will be swept away.

So how do you prevent these potentially harmful effects? It is recommended that you don't go out or it is a heavy rain day out less as far as possible, if must find a flashlight lighting in the outside, especially in rainy day, also don't jaywalk, must take crossings so that security. When you walk on a rainy day, you must pay attention to whether the well cover is washed away by the rain, and try to get to the high geothermal area.