What's the sewer cover called?
Manhole covers are rounded:The manhole located in the road, walk every day when we design People are hurrying to and fro., pay attention to the safety of pedestrians, lid cannot fall into the manhole. If the design is triangular or square, the lid is larger than the head, but it still falls. And if it is round, because the diameter of the circle is equal, so the lid as long as a little bit larger, it will not fall.
I: there will be a lot of city construction of underground pipelines, such as sewer, underground gas pipeline, pipeline, pipeline, tap water power communication pipeline, pipeline and other defense, these pipes every once in a while to have a exit to the surface, from the pipeline to the ground in this section is called the manhole, manhole is flush with the ground therefore, the need for a lid, cover for manhole cover, manhole cover is called. The manhole cover made of common reinforced concrete, metal, plastic and other materials to strengthen, in the shape of circular and square. In the manhole, general use to indicate the underground pipes and pipe support units and telephone and other information.
Sewer cover is also called: manhole cover (inspection: y n.).
