The products are the high-strength W-SMC manhole cover and water grates researched and developed by the company in ***** products are produced through forming a high-density whole by high-temperature moulding with high-strength W-SMC sheet moulding plastics(under the patent application number of 200910095562.5) being the base ***** products are shaped like iron plates with a hard texture, and have made up for the defect of BMC reinforced products for inconformity with testing load. JINMENG compound manhole cover Features: 1.Against theft The compound manhole covers have no value of recycling, thus completely solving the problems caused by theft. ***** Desirable shock-resistance;anti-bending strength;high abrasion resistance, ;high erosion resistance;desirable breakage security;anti-aging properties. 3.Artistic appearance Rich colours; smooth appearance; the colour of covers can keep lasted. 4. Moderate price and light weight Compared with cast iron ones, the weight of compound manhole cover is lighter so that it is convenient to install, ***** price of compound manhole cover is lower than the same specification cast iron ones. ***** load and dimension can be desigened according to the requirements of customer.