... pass ISO9001 and SGS manufacturer selling A, Features of frp manhole cover:a) Corrosion Resistantb) Fire Retardantc) Impact Resistantd) High ... Processing, Electronics Industry, Pharmaceutical Manufacturing, Power Engineering, Metal Smelting, Sewage Treatment, Transportation, Water Plant Breeding, Pulp and paper, Shipbuilding, Civil ... Fence and so on. C,We can made frp manhole cover into many shapes.