Hengtong road Ningbo Co., Ltd. A manufactry of new type Composite manhole cover, from the security, safety, convenience, aesthetics, the use of age has made a historic breakthrough in resolving the issue of urban trap. Products by the domestic use of a number of major cities was received very well. Composite manhole cover, water meter box series Grate and product and technical personnel of the Company by six years of hard work, self-development and design, and has been approved by the State Intellectual Property Office of the patent certificate:new type of composite material cover Patent Number: ZJ200320122314. 6. Grate the new composite material of water Patent Number: ZJ200320122315.0. At the same time adopted the ISO9001 - 2000 quality management system certification. The company product quality of life for the enterprise, has developed strict corporate standards, and in accordance with the ISO9001: 2000 quality management system of scientific management. We adhere to honesty and trustworthiness of business management, thermal pillow welcome friends to our co-operation from all walks of life.