1, the working principle with different basis of machine of model classification pneumatics and compositive component, can divide wait for many model for reciprocating type compressor, screw type compressor and centrifugal type compressor. Among them, reciprocating type compressor applies to force of need high pressure and the situation that measure pettily, screw type compressor applies to the situation that needs medium pressure and medium tolerance, centrifugal type compressor applies to the situation that needs big tolerance and low-pressure power. 2, the pneumatics machine of different type has norms parameter respective norms parameter, include discharge of temperature of exhaust pressure, exhaust, power, rotate speed, gas to wait. These parameter are affecting the work efficiency of pneumatics machine and performance directly. For example, exhaust pressure decided pneumatics function denies contented industry to produce medium demand, power and rotate speed decided the level of specific power consumption of pneumatics machine. Accordingly, when selecting pneumatics engine, need decides appropriate norms parameter according to effective demand and budget. 3, machine of applied domain pneumatics applies extensively at each industries, include building, car, chemical industry, food, pharmacy to wait. In building an industry, pneumatics machine is commonly used the high-pressured force air that wants at supplying building site place, for example concrete eject and clear the job. In automobile industry, the pneumatic tool that pneumatics machine is used on car assembly line and lacquer equipment. In chemical industry, pneumatics machine is commonly used be carried at gas and compress. In food and pharmacy industry, pneumatics machine is used at production of commissariat treatment, beverage and medicaments to make in waiting for process. Anyhow, reach its to use a field through understanding the empty press of different type norms, we can choose to suit the equipment of own demand better. When the choice, parameter of the type that needs to consider pneumatics machine, norms and require yard condition. In the meantime, be safeguarded regularly and maintain pneumatics machine also is to ensure what its work normally and prolong service life is crucial. Hope the article is helped somewhat to you, the success is gained in wishing you to choose and be used in pneumatics machine!