The net oil-free fumigation alliance, and the net oil-free fumigation rate, belong to the beijing encyclopaedia green technologies ltd. Beijing centre for green science and technology co. Ltd. Is a high-technology enterprise that focuses on research, development, marketing and engineering of environmental equipment and services. Work on the development of new, high-tech, industrial and environmentally friendly technologies that provide scientific, efficient and low-cost ways and means of addressing decentralized environmental pollution, based on the principle of in situ sound management. The company has a high-quality research and development and market promotion and service team. It has developed online monitoring products and cloud data platforms, including hydro-water quality online monitoring systems, environmental sewage online monitoring platforms, and environmentally sound gas emissions online monitoring platforms. It has developed integrated low-cost, efficient waste-water t...