Purification project: control products (such as silicon chips, etc.) in contact with the atmosphere of cleanliness and temperature and humidity, so that the product can be produced in a good environmental space, manufacturing. This environmental space design and construction process can be called purification engineering.
Purification engineering is a very wide range of basic supporting industries, (21st century) in electronic information, semiconductors, optoelectronics, precision manufacturing, medicine and health, bioengineering, aerospace, automotive spraying and many other industries have applications, and according to the industry's precision and dust-free requirements, the level of difference is also large.
Currently the highest level when the aerospace aviation warehouse, basically belongs to the level 1, belonging to special areas, the area is relatively small.