The registration address of the filtration facility limited is located at no. 236, home and family villages, in the sanan springs and leisure business park, located in gobei province. The registration authority is zhang zhuang municipal market supervision authority, with legal representatives and includes general items: manufacture of specialized equipment for environmental protection; manufacture of technical services, technology development, technical advice, technology exchange, technology transfer, technology promotion; environmental consultancy services; retail distribution of hardware products; sale of paper products; sale of gas, liquid separation and pure equipment; sale of instruments for environmental monitoring; sale of specialized equipment for environmental protection; sale of machinery spare parts, parts and components; sale of mechanical and electrical equipment; sale of eco-environmental materials; sale of seals; sale of metal materials; sale of mechanical equipment; sale of gas compression machinery; sale of rubber products; sale of plastics; sale of metal products; sale of chemical products (other than licensed chemical products); sale of valves and spins; sale of intelligent transmission and control equipment; and repair of specialized equipment. (in addition to projects subject to authorization under the law, the operation of the business is carried out autonomously under a licence)