Manhole covers can be seen everywhere in the streets of the city.
Manhole covers can be seen everywhere in the streets of the city. They are usually located on both sides of the road, at intersections or other places where underground pipelines need to be laid, and are used to cover the wellheads of drainage pipelines, water supply pipelines, gas pipelines, power cables and other facilities to ensure the normal operation of these facilities and the safety of pedestrians and vehicles.
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