The dry suction of the dental chair is the negative pressure pump to pump the gas into the pump body. The water and impurities that are sucked out of the patient are separated from the gas water separator and then released. The wet pump is the negative pressure pump that pumps out all the water and impurities and gasses sucked out of the patient. These operations are designed to drain water and impurities from patients' mouths in a timely manner so as to prevent the patient from rinsing the mouth repeatedly for the sake of doctors and patients.
