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How about Qingdao Lisan Group?
Qingdao Lisan Group can also independently develop non-negative pressure water supply equipment, which completely changes the disadvantages of traditional water supply methods in China, such as large investment, high energy consumption, serious pollution and large area, and creates a new pattern of improving the quality of urban water supply in China with high technology. It is the only enterprise in the water supply industry that has won the honor of promoting new products from the Ministry of Construction.

Relying on its strong scientific research and development capabilities, the Group continuously upgrades its products, and obtains more than 200 patents every year, and nearly 300 patents per year. Qingdao Lisan Group officially became the exclusive supplier of water supply equipment for Guangzhou 20 10 Asian Games in 2009. It is a high-tech enterprise integrating scientific research and development, engineering design, production and installation, and debugging services.

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The group has established more than 80 marketing branches all over the country, and its products are all over the country. Lisan non-negative pressure water supply equipment is widely used in state organs, various houses, pressurized pumping stations, hotels, schools, hospitals and so on because of its remarkable characteristics of environmental protection, energy saving and safety. It established the position of Lisan Group as a leading enterprise in the secondary water supply industry in China and led the development of the secondary water supply industry in China.

As a leading water supply enterprise in China, Lisan Group has presided over the compilation of four industry standards, namely, non-negative pressure water supply equipment, microcomputer-controlled variable frequency speed regulation water supply equipment, non-negative pressure integrated intelligent water supply equipment and stainless steel cartridge valves. The technical committee on non-negative pressure water supply equipment of the National Urban Water Supply and Drainage Standardization Technical Committee was established in Lisan.

Reference to the above content: Baidu Encyclopedia-Qingdao Lisan Group