Industrial cleaning can generally be according to the following three ways are classified: 1. According to the accuracy requirement of the different cleaning, mainly divided into general industrial cleaning, precision industrial cleaning and ultra precision industrial cleaning three categories. General industrial cleaning including vehicles, ships, aircraft surface cleaning, general can only remove quite thick dirt; Precision industrial cleaning including various products processing and production process of cleaning, all kinds of materials and equipment surface cleaning, etc., to remove tiny dirt particles for characteristics, Super precision cleaning including precision industrial production process of mechanical parts, electronic components, optical component of ultra precision cleaning, to remove iota dirt particles for the purpose.