Decontamination is a very broad application of the basic industries supporting industries, electronic information, semiconductors, optoelectronics, precision manufacturing, medicine, biotechnology, aerospace, automotive and many other industries are spray applied, and in accordance with industry and non-precision dust requirements, class differences as well. Currently the highest level comes aerospace aviation positions, basically belong to one, belonging to specific areas, a relatively small area. In addition to the requirements of a high-level biochemistry laboratory and high-precision nano-materials production plant, development of the Internet of the chip will be a general direction of future demand. Detailed parameters cleanliness standards and cleanliness rating (ISO international standard) for each particle size range maximum allowable concentration (particles / m3) ISO rating 0.1um 0.2um 0.3um 0.5um 1um 5um 1 10 2 2 100 24 10 4 3 1,000 237 1,023,584 10,000 2,370 23,700 1,020 32,835 10,200 3,520 100,000 832,296 237,000 102,000 35,200 8,320,293 1,000,000