Ductile iron manhole cover marketSee more +
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Ductile iron manhole cover manufacturers distribute various specifications of nodular cast iron manhole covers all year round . The sold nodular cast iron manhole covers are low in price and high in quality in the industry. Specializing in the production of gold cast iron manhole covers, five-proof cast iron manhole covers, rainwater rafters, flexible cast iron drainage pipes, cast iron light poles, cast iron seats; pipe fittings, pipe clamps and other casting products.
Ductile iron manhole covers are generally divided into circular and square. In urban road administration, circular is generally used because circular manhole covers are not easy to tilt and can better protect the safety of pedestrians and vehicles. The use of circular is mainly considered that the length of each diameter of the circular manhole cover through its center is the same, so if the manhole cover is rolled up by the passing vehicle, because the diameter will be slightly larger than the wellhead below, Wide, the manhole cover will not fall into the wellhead.
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