Air reduces type number, basically have the following 4 kinds QiAir Compressor 6 months ago Air compressor is to use the device that compresses gas actually, structure and general pump are about the same, it is the commonner machine in the factory, arranged the different type of air compressor today, consult for everybody. 1, the product that compressor of air of frequency conversion of machine of frequency conversion pneumatics develops as new period science and technology, use up in the sources of energy go up to decrease apparently