композитного пластика решетки

1) Environmental Protection/”Green” This product conforms to the environmental protection policies and laws internationally. The product made of glass steel compound material within metal framework inside. 2) Stealing Prevention Within the use of glass steel compound material , completely solves the problem of theft by being produced from non-resalable materials. 3) Long life We use epoxy resin with glass fibre to reduce the cost of metal resource. Research and tests have shown that the product has increased longevity and loading weight compared with the cement. 4) High and low temperature resistant This product tolerates temperatures from –50°C to 200°C, eliminate man-mad reason, the product can survive for 30 years. Our promise is corrosion resistant and insulated. 5) High hardness The benefit with this technology is the product has both hardness from metal and temper from compound material. This product experienced long term daily use and damage tests. 6) Enhanced aesthetic appeal Various colors can be chosen to order: different shapes can be designed to customer’s needs. Have varies range of different shapes and functions of manholes. 7) Easy operation No excessive noise when opening, closing or moving. No needs for lock and easy to access. No noise and rebound when driving by, unlike normal steel and cement manhole covers.