XIN NUO TONG resin technology development co., LTD is China's first professional production of new type of environmental protecting manhole cover, rain perforated straine.composite material manhole cover, rain perforated strainer can not only replace cast iron, nodular cast iron manhole covers, rain perforated strainer, and has no recycle value, environmental protection, no impact noise, corrosion resistant, friction resistance, high and low temperature resistance, light, easy to install, mix all sorts of color can be according to the customer requirements, etc. Sino resin composite material manhole cover, rain perforated strainer not only fundamentally solves the problem such as city of trap, and effectively improve the urban road's taste, urban road and public sector become the preferred product.