Composite covers Features: 1, high strength: Magnesite inspection, has a high compressive strength, flexural, impact resistance, and toughness. The product does not appear to be crushed and damaged, covers long-term use, can completely eliminate the occurrence of "urban black hole" of the accident. 2, the appearance of the United States: Magnesite inspection covers beautifully designed surface pattern, bright colors adjustable, beautify the urban environment. 3, easy to use, light weight: cast iron weight is only about one-third the size huangpi composite covers, easy to transport, installation, repair, greatly reducing the labor intensity. Covers more than 100 anti-theft device, the main use of the six methods: a method for connecting chains, two hinge connection method, three oral anti-spin technique until law, four bolt holes blocking skills composite covers France, five for the lock key France, six joint linkage method for the fork. Wherein the first, two kinds of Manhole covers are not able to lock into one, easy to open, with the drill rod that is capable of chains, pry off the hinges; third place just reverse rotation East Lake theft composite covers, namely open and took the covers; fourth with bolts, nuts blocked hooks Kong Xinzhou composite covers production, but as long as the two grooves of a bowed head at both ends of the wire, inserted under the bolt head in that open and took the covers. Caidian composite covers material | was Wing Technology (certified) | composite manhole cover was provided by the Wuhan Environmental Protection Technology Co., Ltd. Rong. Environmental Science and Technology Co., Ltd., Wuhan was Rong (www.crkjhb.com) (www.crkjhb.com) is Wuhan, a leader in environmentally friendly products processing, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, the maximum to meet customer needs. In the form of wing technology leadership with the staff warmly welcome all inquiries negotiations to create a better form-technology future.