Definition of industrial vacuum
Industrial vacuum refers to the gas space where the air pressure is smaller than a standard atmospheric pressure. It refers to the thin gas state, and can be divided into high vacuum, medium vacuum and low vacuum. The vast space between the earth and the planet is vacuum. Generally, a vacuum is obtained by a special air extractor. Its gas thinness is measured by a vacuum gauge, and it is now possible to obtain a high vacuum of 0.000000001 atmosphere using a molecular aspirator and a diffusion aspirator. Vacuum is of great use in science and technology, electric vacuum instruments, tubes and other electronic instruments.