крышка люка

The company developed the square tube structural composite covers, rain grate, trench cover and other products, the technical parameters are met or exceeded the "Republic of China urban construction industry standards" CJ/T211-2005, CJ/T212-2005 the technical requirements; detected by the national authorities, covers more than capacity in the 36T, 24T or more in the rain grate capacity, far exceeding the national industry standard. April 2006 Republic of China State Intellectual Property Office to obtain a utility model patents and design patent certificate in 2007, Hangzhou Construction Committee has been promoting as a product. This company produces the manhole cover and other products, its bearing capacity and resistance to shear, compression, tensile, bending of high strength, and can solve the security problem, but also to meet the wear and weather requirements.